Search/CVE-2021-34423
● CVE — Critical

CVE-2021-34423

VendorzoomProductmeetings, zoom on-premise meeting connector controller, zoom on-premise meeting connector mmr, zoom on-premise recording connector, zoom on-premise virtual room connector, zoom on-premise virtual room connector load balancer, android meeting sdk, android video sdk, controllers for zoom rooms, hybrid mmr, hybrid zproxy, iphone os meeting sdk, iphone os video sdk, macos meeting sdk, macos video sdk, meetings for blackberry, meetings for chrome os, meetings for intune, rooms for conference rooms, vdi azure virtual desktop, vdi citrix, vdi vmware, virtual desktop infrastructure, windows meeting sdk, windows video sdkDiscoveredNov 24, 2021UpdatedNov 21, 2024

A buffer overflow vulnerability was discovered in Zoom Client for Meetings (for Android, iOS, Linux, macOS, and Windows) before version 5.8.4, Zoom Client for Meetings for Blackberry (for Android and iOS) before version 5.8.1, Zoom Client for Meetings for intune (for Android and iOS) before version 5.8.4, Zoom Client for Meetings for Chrome OS before version 5.0.1, Zoom Rooms for Conference Room (for Android, AndroidBali, macOS, and Windows) before version 5.8.3, Controllers for Zoom Rooms (for Android, iOS, and Windows) before version 5.8.3, Zoom VDI Windows Meeting Client before version 5.8.4, Zoom VDI Azure Virtual Desktop Plugins (for Windows x86 or x64, IGEL x64, Ubuntu x64, HP ThinPro OS x64) before version 5.8.4.21112, Zoom VDI Citrix Plugins (for Windows x86 or x64, Mac Universal…

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CVSS v3.1
9.8 CRITICAL
EPSS
3.27%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Aug 16, 2026 → Sep 19, 2026
▲ 0.06pp
3.21% → 3.27% over 2 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
ConfidentialityHIGH
IntegrityHIGH
AvailabilityHIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Connections
26 relationships
Timeline
disclosure → media coverage
Nov 24, 2021
Disclosure — published as a CVE record. · last revised by NVD Nov 21, 2024