CVE-2025-55188

7-Zip before 25.01 does not always properly handle symbolic links during extraction.

Weakness

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Affected Software

Potential Mitigations

• Follow the principle of least privilege when assigning access rights to entities in a software system.
• Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/132.html
• https://cwe.mitre.org/data/definitions/17.html
• https://cwe.mitre.org/data/definitions/35.html
• https://cwe.mitre.org/data/definitions/76.html

References

• https://github.com/ip7z/7zip/compare/25.00...25.01
• https://github.com/ip7z/7zip/releases/tag/25.01
• https://lunbun.dev/blog/cve-2025-55188/
• https://sourceforge.net/p/sevenzip/discussion/45797/thread/da14cd780b/
• https://www.openwall.com/lists/oss-security/2025/08/09/1
• https://youtu.be/sWT6M1cfnwM