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CVE-2020-28949

High CVSS 7.8 Known exploited

Published 2020-11-19 · last changed 2026-06-17 · added to CISA KEV 2022-08-25

This one is being exploited in the wild.

CISA added CVE-2020-28949 to the Known Exploited Vulnerabilities catalog on 2022-08-25. Federal agencies are required to remediate it on a deadline. If you have affected machines, this is the class of finding that moves ahead of the rest of the queue.

The fix

We hold no Microsoft remediation data for CVE-2020-28949, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

Archive_Tar through 1.4.10 has :// filename sanitization only to address phar attacks, and thus any other stream-wrapper attack (such as file:// to overwrite files) can still succeed.

Sources

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H