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Vulnerability record · CVE-2009-1784 · published 22 May 2009

CVE-2009-1784: Avg anti-virus improper input validation vulnerability

Avg · Avg Anti Virus

The AVG parsing engine 8.5 323, as used in multiple AVG anti-virus products including Anti-Virus Network Edition, Internet Security Netzwerk Edition, Server Edition für Linux/FreeBSD, Anti-Virus SBS Edition, and others allows remote attackers to bypass malware detection via a crafted (1) RAR and (2) ZIP archive.

10.0 CVSS 2.0 High EPSS 3.4% · top 11.6% CWE-20 · Improper input validation
10.0CVSS 2.0 base score
3.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
16 Jun 2026Last modified by NVD

Description

The AVG parsing engine 8.5 323, as used in multiple AVG anti-virus products including Anti-Virus Network Edition, Internet Security Netzwerk Edition, Server Edition für Linux/FreeBSD, Anti-Virus SBS Edition, and others allows remote attackers to bypass malware detection via a crafted (1) RAR and (2) ZIP archive.

AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://blog.zoller.lu/2009/04/avg-zip-evasion-bypass.html
http://www.securityfocus.com/archive/1/503392/100/0/threaded
http://www.securityfocus.com/bid/34895
https://exchange.xforce.ibmcloud.com/vulnerabilities/50426
http://blog.zoller.lu/2009/04/avg-zip-evasion-bypass.html
http://www.securityfocus.com/archive/1/503392/100/0/threaded
http://www.securityfocus.com/bid/34895
https://exchange.xforce.ibmcloud.com/vulnerabilities/50426

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2009-1784), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.