Improper signature verification in Zoom for Windows Client
Priority LOW 33CWE-347Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-347.
Summary
Zoom for Windows clients prior to 5.13.5 contain an improper verification of cryptographic signature vulnerability. A malicious user may potentially downgrade Zoom Client components to previous versions.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00312 24th percentileScored 2026-11-07
Fix Fixed Zoom for Windows Client (Zoom Video Communications, Inc.): 5.13.5
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Zoom Video Communications, Inc. | Zoom for Windows Client | before 5.13.5 | 5.13.5 | Patch available | CNA |
- Zoom for Windows Client VendorZoom Video Communications, Inc. Affected before 5.13.5 Fixed in 5.13.5 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:zoom:zoom:*:*:*:*:*:windows:*:* | before 5.13.5 | Vulnerable | Zoom Video Communications, Inc. |
- cpe:2.3:a:zoom:zoom:*:*:*:*:*:windows:*:* Versions before 5.13.5 Vulnerable ·Zoom Video Communications, Inc.
Remediation
- Fix · CNA Zoom for Windows Client (Zoom Video Communications, Inc.) Fixed in 5.13.5
Timeline
- 2026-10-02 Threatist record created from CVE-2023-28602
- 2026-10-03 Alias added: GHSA-2c5r-8h52-phwr
References
More Zoom Video Communications, Inc. Zoom vulnerabilities
- TI-2017-11048 The ZoomLauncher binary in the Zoom client for Linux before 2.0.115900.1201 does not… CVSS 3.1HIGH 8.8
- TI-2017-11047 Stack-based buffer overflow in the ZoomLauncher binary in the Zoom client for Linux… CVSS 3.1HIGH 8.8
- TI-2020-04976 Path traversal in Zoom CVSS 3.1CRITICAL 9.8
- TI-2018-11203 Authentication bypass by spoofing in Zoom CVSS 3.0CRITICAL 9.8
- TI-2024-16222 Zoom Desktop Client for Windows, Zoom VDI Client for Windows, and Zoom Meeting SDK for… CVSS 3.1CRITICAL 9.8
- TI-2023-20371 Injection in Zoom Desktop Client for Windows and Zoom VDI Client CVSS 3.1CRITICAL 9.8
Sources
- CVE-2023-28602 · CVE Program
- CVE-2023-28602 · NVD
- FIRST EPSS
- GHSA-2c5r-8h52-phwr · GitHub Advisory Database · CC BY 4.0
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