VULNERABILITY INTELLIGENCE

CVE-2026-66768

CVSS score9 CRITICAL

EPSS probability0.12%

CISA KEVNot currently listed

Published2026-09-08

Last modified2026-09-09

Description

Heap buffer out-of-bounds write vulnerability in Avira Antivirus engine when scanning a malformed POSIX tar archive may allow Local Execution of Code or Denial-of-Service of the antivirus engine process. This issue affects Avira Antivirus on Windows, macOS, and Linux for engine builds before 8.3.27.12.