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Vulnerability record · CVE-2006-5646 · published 1 November 2006

CVE-2006-5646: Sophos anti-virus memory buffer overflow vulnerability

Sophos · Anti Virus

Heap-based buffer overflow in Sophos Anti-Virus and Endpoint Security before 6.0.5, Anti-Virus for Linux before 5.0.10, and other platforms before 4.11, when archive scanning is enabled, allows remote attackers to trigger a denial of service (memory corruption) via a CHM file with an LZX decompression header that specifies a Window_size of 0.

5.0 CVSS 2.0 Medium EPSS 18% · top 2.9% CWE-119 · Memory buffer overflow
5.0CVSS 2.0 base score
18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
12References
16 Jun 2026Last modified by NVD

Description

Heap-based buffer overflow in Sophos Anti-Virus and Endpoint Security before 6.0.5, Anti-Virus for Linux before 5.0.10, and other platforms before 4.11, when archive scanning is enabled, allows remote attackers to trigger a denial of service (memory corruption) via a CHM file with an LZX decompression header that specifies a Window_size of 0.

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

Affected products

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

References

LinkTags
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=452
http://secunia.com/advisories/22591 Vendor Advisory
http://securitytracker.com/id?1017132
http://www.securityfocus.com/bid/20816
http://www.sophos.com/support/knowledgebase/article/7609.html
http://www.vupen.com/english/advisories/2006/4239 Vendor Advisory
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=452
http://secunia.com/advisories/22591 Vendor Advisory
http://securitytracker.com/id?1017132
http://www.securityfocus.com/bid/20816
http://www.sophos.com/support/knowledgebase/article/7609.html
http://www.vupen.com/english/advisories/2006/4239 Vendor Advisory

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Related vulnerabilities

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

10.0CVE-2008-6904Sophos anti-virus vulnerabilityMultiple unspecified vulnerabilities in Sophos SAVScan 4.33.0 for Linux, and possibly other products and versions, allow remote attackers to cause a …EPSS 11%9.3CVE-2008-5541Sophos anti-virus improper input validation vulnerabilitySophos Anti-Virus 4.33.0, when Internet Explorer 6 or 7 is used, allows remote attackers to bypass detection of malware in an HTML document by placin…EPSS 7.6%7.8CVE-2007-4577Sophos anti-virus vulnerabilitySophos Anti-Virus for Unix/Linux before 2.48.0 allows remote attackers to cause a denial of service (infinite loop) via a malformed BZip file that re…EPSS 5.5%7.2CVE-2010-2308Sophos anti-virus vulnerabilityUnspecified vulnerability in the filter driver (savonaccessfilter.sys) in Sophos Anti-Virus before 7.6.20 allows local users to gain privileges via c…EPSS 1.2%6.9CVE-2008-1737Sophos anti-virus improper input validation vulnerabilitySophos Anti-Virus 7.0.5, and other 7.x versions, when Runtime Behavioural Analysis is enabled, allows local users to cause a denial of service (reboo…EPSS 0.62%6.8CVE-2007-4578Sophos anti-virus vulnerabilitySophos Anti-Virus for Windows and for Unix/Linux before 2.48.0 allows remote attackers to cause a denial of service (crash) and possibly execute arbi…EPSS 7.3%6.4CVE-2006-5647Sophos anti-virus memory buffer overflow vulnerabilitySophos Anti-Virus and Endpoint Security before 6.0.5, Anti-Virus for Linux before 5.0.10, and other platforms before 4.11 allows remote attackers to …EPSS 21%5.0CVE-2006-5645Sophos anti-virus vulnerabilitySophos Anti-Virus and Endpoint Security before 6.0.5, Anti-Virus for Linux before 5.0.10, and other platforms before 4.11, when "Enabled scanning of …EPSS 18%

Source: NIST National Vulnerability Database (record CVE-2006-5646), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.