CVE-2021-32840: Sharpziplib Project Sharpziplib

Critical severity, CVSS 9.8. EPSS: 1.9% chance of exploitation in the next 30 days.

SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 library. Prior to version 1.3.3, a TAR file entry `../evil.txt` may be extracted in the parent directory of `destFolder`. This leads to arbitrary file write that may lead to code execution. The vulnerability was patched in version 1.3.3.

Affected products

• Sharpziplib Project Sharpziplib: before 1.3.3 (fixed in 1.3.3)

Published 2022-01-26. Last modified 2026-06-17.