CVE-2006-5646

Sophos Anti-Virus and Endpoint Security < 6.0.5 - Heap-Based Buffer Overflow via CHM LZX Decompression

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2006-5646. PoCs published by Damian Put.

AI-analyzed exploit summary This exploit leverages a heap overflow vulnerability in Sophos Antivirus when processing a maliciously crafted CHM file. The provided CHM file (2910.chm) triggers the overflow, potentially leading to remote code execution.

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.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Damian Put · textdosmultiple
https://www.exploit-db.com/exploits/2910

This exploit leverages a heap overflow vulnerability in Sophos Antivirus when processing a maliciously crafted CHM file. The provided CHM file (2910.chm) triggers the overflow, potentially leading to remote code execution.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Sophos Antivirus (version not specified)
No auth needed
Prerequisites: Victim must open the malicious CHM file
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (6)

Core 6
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://securitytracker.com/id?1017132
Vendor Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2006/4239
Third Party Advisory third-party-advisory x_refsource_idefense
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=452
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/20816
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/22591

Scores

EPSS 0.1743
EPSS Percentile 96.7%

Details

CWE
CWE-119
Status published
Products (16)
sophos/anti-virus 4.04
sophos/anti-virus 4.05
sophos/anti-virus 4.5.3
sophos/anti-virus 4.5.4
sophos/anti-virus 4.5.11
sophos/anti-virus 4.5.12
sophos/anti-virus 4.7.1
sophos/anti-virus 4.7.2
sophos/anti-virus 5.0.1
sophos/anti-virus 5.0.2
... and 6 more
Published Nov 01, 2006
Tracked Since Feb 18, 2026