Search/CVE-2026-8863
● CVE — High

CVE-2026-8863

DiscoveredJun 9, 2026UpdatedJul 23, 2026

Multiple Microsoft-sigend UEFI SHIM bootloaders are vulnerable to SecureBoot bypass. An attacker with administrative privileges or the ability to modify the boot process could use one of the vulnerable shim bootloaders to bypass Secure Boot protections and execute arbitrary code before the operating system loads. Specific UEFI DBX update is required to block these vulnerable boot loaders.

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CVSS v3.1
7.8 HIGH
EPSS
0.11%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
1
sources referencing this CVE
Related IOCs
0
seen in the same coverage
Intelligence Reports11
11 intelligence reports available

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EPSS Trend
Sep 25, 2026 → Oct 26, 2026
● 0.00pp
0.11% → 0.11% over 2 tracked changes
CVSS v3.1 Detail
Attack VectorLOCAL
Attack ComplexityLOW
Privileges RequiredLOW
User InteractionNONE
ScopeUNCHANGED
ConfidentialityHIGH
IntegrityHIGH
AvailabilityHIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Connections
1 relationships
NCSC-2026-0181 [1.00] [H/H] Kwetsbaarheden verholpen in Microsoft Windows
Microsoft heeft een groot aantal kwetsbaarheden verholpen in Windows. Een kwaadwillende kan de kwetsbaarheden misbruiken om aanvallen uit te voeren die kunnen leiden tot diverse categorieën schade, zoals omschreven in onderstaande tabellen. Tussen deze kwetsbaarheden zitten een zestal zeer ernstige, welke door Microsoft zijn ingeschaald met een CVSS score van 9 en hoger. Deze kwetsbaarheden bevinden zich in diverse componenten van Windows die bereikbaar en benaderbaar zijn vanaf netwerkverbindingen, zoals http.sys, DHCP, de Kernel en TCP/IP. Door de externe bereikbaarheid en de mogelijkheden tot uitvoer van willekeurige code, is het risico op grootschalig misbruik op korte termijn aanwezig. Op dit moment wordt (nog) geen actief misbruik waargenomen en is (nog) geen publieke Proof-of-Concept (PoC) of exploit bekend, maar het NCSC verwacht deze wel op korte termijn en adviseert daarom deze updates met spoed in te zetten. `` Windows TCP/IP: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-42904 | 9.60 | Verkrijgen van verhoogde rechten | | CVE-2026-42915 | 5.70 | Denial-of-Service | |----------------|------|-------------------------------------| Windows BitLocker: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45655 | 5.30 | Omzeilen van beveiligingsmaatregel | | CVE-2026-45658 | 7.80 | Omzeilen van beveiligingsmaatregel | | CVE-2026-50507 | 6.80 | Omzeilen van beveiligingsmaatregel | |----------------|------|-------------------------------------| Windows Mark of the Web (MOTW): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45595 | 5.40 | Omzeilen van beveiligingsmaatregel | |----------------|------|-------------------------------------| Windows Win32K - GRFX: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-44803 | 7.80 | Uitvoeren van willekeurige code | | CVE-2026-44812 | 7.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Push Notifications: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-42969 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-42971 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-42970 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-42973 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-42978 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-42977 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-42979 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-42991 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Microsoft Windows DNS: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-41108 | 7.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Bluetooth Port Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45640 | 7.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Ancillary Function Driver for WinSock: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-34335 | 7.00 | Verkrijgen van verhoogde rechten | | CVE-2026-45601 | 7.00 | Verkrijgen van verhoogde rechten | | CVE-2026-45598 | 7.00 | Verkrijgen van verhoogde rechten | | CVE-2026-45596 | 7.00 | Verkrijgen van verhoogde rechten | | CVE-2026-45638 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-45603 | 7.00 | Verkrijgen van verhoogde rechten | | CVE-2026-42911 | 7.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Function Discovery Service (fdwsd.dll): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-42836 | 7.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Kernel: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-10263 | 9.30 | Verkrijgen van verhoogde rechten | | CVE-2026-45657 | 9.80 | Uitvoeren van willekeurige code | | CVE-2026-48583 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-45653 | 7.00 | Verkrijgen van verhoogde rechten | | CVE-2026-42984 | 7.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Secure Boot: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45588 | 7.90 | Omzeilen van beveiligingsmaatregel | | CVE-2026-48568 | 7.90 | Omzeilen van beveiligingsmaatregel | | CVE-2026-48570 | 7.90 | Omzeilen van beveiligingsmaatregel | | CVE-2026-48573 | 7.90 | Omzeilen van beveiligingsmaatregel | | CVE-2026-48575 | 7.90 | Omzeilen van beveiligingsmaatregel | | CVE-2026-48576 | 7.90 | Omzeilen van beveiligingsmaatregel | | CVE-2026-48578 | 7.90 | Verkrijgen van verhoogde rechten | | CVE-2026-45654 | 7.90 | Omzeilen van beveiligingsmaatregel | |----------------|------|-------------------------------------| Remote Desktop Client: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-47289 | 8.80 | Uitvoeren van willekeurige code | | CVE-2026-47653 | 8.80 | Uitvoeren van willekeurige code | | CVE-2026-47654 | 7.50 | Uitvoeren van willekeurige code | | CVE-2026-48563 | 7.50 | Uitvoeren van willekeurige code | | CVE-2026-42909 | 7.50 | Uitvoeren van willekeurige code | | CVE-2026-42913 | 7.50 | Uitvoeren van willekeurige code | | CVE-2026-42992 | 7.50 | Uitvoeren van willekeurige code | | CVE-2026-44799 | 7.50 | Uitvoeren van willekeurige code | | CVE-2026-44801 | 7.50 | Uitvoeren van willekeurige code | | CVE-2026-42985 | 8.80 | Uitvoeren van willekeurige code | | CVE-2026-42993 | 7.50 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Microsoft UxTheme Library (uxtheme.dll): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45606 | 5.50 | Denial-of-Service | |----------------|------|-------------------------------------| Windows Kernel-Mode Drivers: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45600 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows DHCP Client: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45608 | 6.80 | Toegang tot gevoelige gegevens | | CVE-2026-44815 | 9.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Universal Plug and Play (upnp.dll): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45599 | 8.10 | Uitvoeren van willekeurige code | | CVE-2026-45635 | 8.10 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Bluetooth Service: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45605 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows UEFI: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45656 | 7.80 | Omzeilen van beveiligingsmaatregel | | CVE-2026-8863 | 7.80 | Omzeilen van beveiligingsmaatregel | |----------------|------|-------------------------------------| Windows Hotpatch Monitoring Service: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-42910 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Microsoft Azure Attestation service and Device Health Attestation Service: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-33828 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-45642 | 3.90 | Voordoen als andere gebruiker | |----------------|------|-------------------------------------| Windows RDP: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45639 | 7.50 | Toegang tot gevoelige gegevens | | CVE-2026-42908 | 7.50 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Winlogon: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-42989 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Collaborative Translation Framework: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45586 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Kerberos: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-47288 | 7.10 | Uitvoeren van willekeurige code | | CVE-2026-42903 | 6.50 | Denial-of-Service | | CVE-2026-42914 | 5.30 | Denial-of-Service | |----------------|------|-------------------------------------| Windows Cryptographic Services: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-44810 | 8.40 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows NTFS: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45636 | 7.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Universal Disk Format File System Driver (UDFS): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-40409 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-40404 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Microsoft Graphics Component: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-42986 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Hyper-V: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45607 | 8.40 | Uitvoeren van willekeurige code | | CVE-2026-47652 | 8.20 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows NT OS Kernel: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-42980 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-42916 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Common Log File System Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-44809 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Projected File System Filter Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-42828 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-42837 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| UI Automation Manager (uiamanager.dll): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45597 | 7.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows HTTP.sys: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-47291 | 9.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Microsoft Kinect: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-41092 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows SDK: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45593 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Media: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-48574 | 7.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Performance Monitor: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-42981 | 8.10 | Uitvoeren van willekeurige code | | CVE-2026-42974 | 8.10 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Application Identity (AppID) Subsystem: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45594 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-45604 | 5.50 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Windows Administrator Protection: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-42829 | 7.80 | Omzeilen van beveiligingsmaatregel | |----------------|------|-------------------------------------| Role: Windows Hyper-V: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45641 | 8.40 | Uitvoeren van willekeurige code | | CVE-2026-42972 | 5.50 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Windows Narrator Braille: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-48565 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows DHCP Server: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45634 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-45602 | 9.10 | Manipulatie van gegevens | |----------------|------|-------------------------------------| Windows Internet (wininet.dll): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45592 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Deployment Services: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-42987 | 8.10 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| HTTP/2: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-49160 | 7.50 | Denial-of-Service | |----------------|------|-------------------------------------| Windows Telephony Service: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-42912 | 7.00 | Verkrijgen van verhoogde rechten | | CVE-2026-42968 | 5.50 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Windows Network Controller (NC) Host Agent: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-44805 | 5.50 | Denial-of-Service | |----------------|------|-------------------------------------| Windows DWM Core Library: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-48566 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-45637 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-42905 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-44811 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-44808 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-44807 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-42983 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-44802 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-44814 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-44813 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-44804 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Boot Manager: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-47656 | 7.90 | Omzeilen van beveiligingsmaatregel | |----------------|------|-------------------------------------| Windows Program Compatibility Assistant Service: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45487 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Storage: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-47648 | 7.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Shell: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-42906 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-42907 | 6.50 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Active Directory Domain Services: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45648 | 8.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| ``
advisories.ncsc.nlJun 9, 2026extracted
Timeline
disclosure → media coverage
Jun 9, 2026
advisories.ncsc.nl reports: NCSC-2026-0181 [1.00] [H/H] Kwetsbaarheden verholpen in Microsoft Windows
Jun 9, 2026
Disclosure — published as a CVE record. · last revised by NVD Jul 23, 2026
Public PoC (1)
github.com/0xbekoo/CVE-2026-8863
Unverified third-party code — review before executing.