CVE-2007-1672: Avast Antivirus

High severity, CVSS 7.8. EPSS: 3.2% chance of exploitation in the next 30 days.

avast! antivirus before 4.7.981 allows remote attackers to cause a denial of service (infinite loop) via a ZOO archive with a direntry structure that points to a previous file.

Affected products

• Avast Avast Antivirus: up to and including 4.7.980

Published 2007-05-09. Last modified 2026-06-16.