CVE-2021-34424 json
Process memory exposure in Zoom Client and other products
published 2021-11-24 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-21082
- cvss
- 5.3
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.7%
- EPSS 1.7% chance of exploitation in 30 days, percentile 77%
- public exploits
- 0
- none known
Summary
A vulnerability was discovered in the 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 Installer & Uninstaller, IGEL x64, eLux RP6 x64, HP ThinPro OS x64, Ubuntu x64, CentOS x 64, Dell ThinOS) before version 5.8.4.21112, Zoom VDI VMware Plugins (for Windows x86 or x64, Mac Universal Installer & Uninstaller, IGEL x64, eLux RP6 x64, HP ThinPro OS x64, Ubuntu x64, CentOS x 64, Dell ThinOS) before version 5.8.4.21112, Zoom Meeting SDK for Android before version 5.7.6.1922, Zoom Meeting SDK for iOS before version 5.7.6.1082, Zoom Meeting SDK for macOS before version 5.7.6.1340, Zoom Meeting SDK for Windows before version 5.7.6.1081, Zoom Video SDK (for Android, iOS, macOS, and Windows) before version 1.1.2, Zoom on-premise Meeting Connector before version 4.8.12.20211115, Zoom on-premise Meeting Connector MMR before version 4.8.12.20211115, Zoom on-premise Recording Connector before version 5.1.0.65.20211116, Zoom on-premise Virtual Room Connector before version 4.4.7266.20211117, Zoom on-premise Virtual Room Connector Load Balancer before version 2.5.5692.20211117, Zoom Hybrid Zproxy before version 1.0.1058.20211116, and Zoom Hybrid MMR before version 4.6.20211116.131_x86-64 which potentially allowed for the exposure of the state of process memory. This issue could be used to potentially gain insight into arbitrary areas of the product's memory.
Patch / fix
- Zoom Video Communications Inc Zoom Client for Meetings (for Android, iOS, Linux, macOS, and Windows) 5.8.4
- Zoom Video Communications Inc Zoom Client for Meetings for Blackberry (for Android and iOS) 5.8.1
- Zoom Video Communications Inc Zoom Client for Meetings for intune (for Android and iOS) 5.8.4
- Zoom Video Communications Inc Zoom Client for Meetings for Chrome OS 5.0.1
- Zoom Video Communications Inc Zoom Rooms for Conference Room (for Android, AndroidBali, macOS, and Windows) 5.8.3
- Zoom Video Communications Inc Controllers for Zoom Rooms (for Android, iOS, and Windows) 5.8.3
- Zoom Video Communications Inc Zoom VDI Windows Meeting Client 5.8.4
- Zoom Video Communications Inc Zoom VDI Azure Virtual Desktop Plugins (for Windows x86 or x64, IGEL x64, Ubuntu x64, HP ThinPro OS x64) 5.8.4.21112
- Zoom Video Communications Inc Zoom VDI Citrix Plugins (for Windows x86 or x64, Mac Universal Installer & Uninstaller, IGEL x64, eLux RP6 x64, HP ThinPro OS x64, Ubuntu x64, CentOS x 64, Dell ThinOS) 5.8.4.21112
- Zoom Video Communications Inc Zoom VDI VMware Plugins (for Windows x86 or x64, Mac Universal Installer & Uninstaller, IGEL x64, eLux RP6 x64, HP ThinPro OS x64, Ubuntu x64, CentOS x 64, Dell ThinOS) 5.8.4.21112
- Zoom Video Communications Inc Zoom Meeting SDK for Android 5.7.6.1922
- Zoom Video Communications Inc Zoom Meeting SDK for iOS 5.7.6.1082
- Zoom Video Communications Inc Zoom Meeting SDK for macOS 5.7.6.1340
- Zoom Video Communications Inc Zoom Meeting SDK for Windows 5.7.6.1081
- Zoom Video Communications Inc Zoom Video SDK (for Android, iOS, macOS, and Windows) 1.1.2
- Zoom Video Communications Inc Zoom on-premise Meeting Connector 4.8.12.20211115
- Zoom Video Communications Inc Zoom on-premise Meeting Connector MMR 4.8.12.20211115
- Zoom Video Communications Inc Zoom on-premise Recording Connector 5.1.0.65.20211116
- Zoom Video Communications Inc Zoom on-premise Virtual Room Connector 4.4.7266.20211117
- Zoom Video Communications Inc Zoom on-premise Virtual Room Connector Load Balancer 2.5.5692.20211117
- Zoom Video Communications Inc Zoom Hybrid Zproxy 1.0.1058.20211116
- Zoom Video Communications Inc Zoom Hybrid MMR 4.6.20211116.131_x86-64
Exploit prediction
1.72% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 5.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Affected products
- Zoom Video Communications Inc Zoom Client for Meetings (for Android, iOS, Linux, macOS, and Windows)
- Zoom Video Communications Inc Zoom Client for Meetings for Blackberry (for Android and iOS)
- Zoom Video Communications Inc Zoom Client for Meetings for intune (for Android and iOS)
- Zoom Video Communications Inc Zoom Client for Meetings for Chrome OS
- Zoom Video Communications Inc Zoom Rooms for Conference Room (for Android, AndroidBali, macOS, and Windows)
- Zoom Video Communications Inc Controllers for Zoom Rooms (for Android, iOS, and Windows)
- Zoom Video Communications Inc Zoom VDI Windows Meeting Client
- Zoom Video Communications Inc Zoom VDI Azure Virtual Desktop Plugins (for Windows x86 or x64, IGEL x64, Ubuntu x64, HP ThinPro OS x64)
- Zoom Video Communications Inc Zoom VDI Citrix Plugins (for Windows x86 or x64, Mac Universal Installer & Uninstaller, IGEL x64, eLux RP6 x64, HP ThinPro OS x64, Ubuntu x64, CentOS x 64, Dell ThinOS)
- Zoom Video Communications Inc Zoom VDI VMware Plugins (for Windows x86 or x64, Mac Universal Installer & Uninstaller, IGEL x64, eLux RP6 x64, HP ThinPro OS x64, Ubuntu x64, CentOS x 64, Dell ThinOS)
- Zoom Video Communications Inc Zoom Meeting SDK for Android
- Zoom Video Communications Inc Zoom Meeting SDK for iOS
- Zoom Video Communications Inc Zoom Meeting SDK for macOS
- Zoom Video Communications Inc Zoom Meeting SDK for Windows
- Zoom Video Communications Inc Zoom Video SDK (for Android, iOS, macOS, and Windows)
- Zoom Video Communications Inc Zoom on-premise Meeting Connector
- Zoom Video Communications Inc Zoom on-premise Meeting Connector MMR
- Zoom Video Communications Inc Zoom on-premise Recording Connector
- Zoom Video Communications Inc Zoom on-premise Virtual Room Connector
- Zoom Video Communications Inc Zoom on-premise Virtual Room Connector Load Balancer
- Zoom Video Communications Inc Zoom Hybrid Zproxy
- Zoom Video Communications Inc Zoom Hybrid MMR
Classification
- Weakness
-
- CWE-125 Out-of-bounds Read
- Technology feeds
References
-
explore.zoom.us
/en/trust/security/security-bulletin
vendor-advisory
-
packetstormsecurity.com
/files/165419/Zoom-MMR-Server-Information-Leak.html
third-party-advisory, vdb-entry
Sources
- CVE List CVE-2021-34424
- NVD CVE-2021-34424
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