CVE-2009-1784: The AVG parsing engine 8.5 323, as used in multiple AVG anti-virus products including Anti-Virus Network Ed...

Security readout for executives and security teams

CVE-2009-1784 is a malware-detection bypass in AVG’s 8.5 323 parsing engine. Crafted RAR or ZIP archives could evade AVG scanning, allowing malicious content to pass a control that organizations may have trusted. Exposure is most likely in legacy AVG deployments using parsing engine 8.5 323, especially endpoints, servers, or mail/file gateways that inspect ZIP or RAR archives with affected AVG products. Treat this as a legacy security-control weakness. It is not documented here as actively exploited, but systems still relying on the affected AVG engine may silently miss malware in archives. Mitigation focus: Inventory AVG products and identify any using parsing engine 8.5 323.; Check AVG or successor vendor guidance for updates or retirement advice.; Update, replace, or remove legacy affected AVG scanning components..

Prepared

Jun 28, 2026, 10:45 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.