Search/CVE-2026-69414
● CVE — High

CVE-2026-69414

VendormicrosoftProductmalware protection engineDiscoveredAug 14, 2026UpdatedOct 28, 2026

Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "ShieldBreak ".

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CVSS v3.1
7.8 HIGH
EPSS
1.37%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
5
sources referencing this CVE
Related IOCs
0
seen in the same coverage
Intelligence Reports1
1 intelligence report available

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EPSS Trend
Aug 16, 2026 → Oct 30, 2026
▲ 1.14pp
0.24% → 1.37% over 6 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
11 relationships
Timeline
disclosure → media coverage
Aug 14, 2026
Disclosure — published as a CVE record. · last revised by NVD Oct 28, 2026
Aug 17, 2026
bleepingcomputer.com reports: Microsoft working on Defender patch for ShieldBreak zero-day
Aug 17, 2026
malwarebytes.com reports: ShieldBreak bypasses Microsoft’s patch for earlier Defender flaw
Sep 9, 2026
thehackernews.com reports: Researcher Drops New Microsoft Defender PoC Showing ShieldBreak Patch Can Be Bypassed
Sep 9, 2026
helpnetsecurity.com reports: September 2026 Patch Tuesday: Record patch count, 2 zero-days, and a SigRed successor
Sep 9, 2026
theregister.com reports: Serial Microsoft 0-day hunter drops yet another Defender exploit
Public PoC (1)
github.com/1neptune/ShieldBreak
Unverified third-party code — review before executing.