CVE-2021-21813: Att Xmill

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

Within the function HandleFileArg the argument filepattern is under control of the user who passes it in from the command line. filepattern is passed directly to memcpy copying the path provided by the user into a staticly sized buffer without any length checks resulting in a stack-buffer overflow.

Affected products

• Att Xmill: version 0.7 only

Published 2021-08-13. Last modified 2026-06-17.