Vulnerability Description
7-Zip for Windows through 26.02 fails to preserve the Mark-of-the-Web when extracting a crafted RAR5 archive, because its guard that suppresses an archive-supplied Zone.Identifier stream matches the exact name 'Zone.Identifier' while a RAR5 STM record named ':Zone.Identifier:$DATA' is not matched and NTFS canonicalizes it to the same stream, overwriting the propagated Internet-zone marker with ZoneId=0. A second STM record named '::$DATA' overwrites the extracted file's default data stream, letting an attacker defeat SmartScreen/MotW warnings and spoof file content.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://github.com/bikini/exploitarium/tree/main/7zip-rar5-motw-chain-poc
- https://github.com/ip7z/7zip
- https://www.vulncheck.com/advisories/7-zip-mark-of-the-web-bypass-via-rar5-alter
FAQ
What is CVE-2026-58052?
CVE-2026-58052 is a vulnerability with a CVSS score of 3.3 (LOW). 7-Zip for Windows through 26.02 fails to preserve the Mark-of-the-Web when extracting a crafted RAR5 archive, because its guard that suppresses an archive-supplied Zone.Identifier stream matches the e...
How severe is CVE-2026-58052?
CVE-2026-58052 has been rated LOW with a CVSS base score of 3.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-58052?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.