How severe is CVE-2006-5645?

CVE-2006-5645 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2006-5645 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-5645?

CVE-2006-5645 primarily affects Sophos Anti-virus. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-5645?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2006-5645 published?

CVE-2006-5645 was published on 2006-11-01 and last updated on 2026-06-16.

CVE-2006-5645

CVE-2006-5645 is a medium-severity vulnerability in Sophos Anti-virus with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 17% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-399.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 17% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Sophos Anti-virus
Published: 2006-11-01
Last modified: 2026-06-16

Description

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 "Enabled scanning of archives" is set, allows remote attackers to cause a denial of service (infinite loop) via a malformed RAR archive with an Archive Header section with the head_size and pack_size fields set to zero.

Frequently asked questions

What is CVE-2006-5645?: 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 "Enabled scanning of archives" is set, allows remote attackers to cause a denial of service (infinite loop) via a malformed RAR archive with an Archive Header section with the head_size and pack_size fields set to zero.
How severe is CVE-2006-5645?: CVE-2006-5645 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2006-5645 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-5645?: CVE-2006-5645 primarily affects Sophos Anti-virus. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-5645?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-5645 published?: CVE-2006-5645 was published on 2006-11-01 and last updated on 2026-06-16.

References

Affected products (16)

cpe:2.3:a:sophos:anti-virus:4.04:*:*:*:*:*:*:*
cpe:2.3:a:sophos:anti-virus:4.05:*:*:*:*:*:*:*
cpe:2.3:a:sophos:anti-virus:4.5.3:*:*:*:*:*:*:*
cpe:2.3:a:sophos:anti-virus:4.5.4:*:*:*:*:*:*:*
cpe:2.3:a:sophos:anti-virus:4.5.11:*:*:*:*:*:*:*
cpe:2.3:a:sophos:anti-virus:4.5.12:*:*:*:*:*:*:*
cpe:2.3:a:sophos:anti-virus:4.7.1:*:*:*:*:*:*:*
cpe:2.3:a:sophos:anti-virus:4.7.2:*:*:*:*:*:*:*
cpe:2.3:a:sophos:anti-virus:5.0.1:*:*:*:*:*:*:*
cpe:2.3:a:sophos:anti-virus:5.0.2:*:*:*:*:*:*:*
cpe:2.3:a:sophos:anti-virus:5.0.4:*:*:*:*:*:*:*
cpe:2.3:a:sophos:anti-virus:5.1:*:*:*:*:*:*:*
cpe:2.3:a:sophos:anti-virus:5.2:*:*:*:*:*:*:*
cpe:2.3:a:sophos:anti-virus:5.2.1:*:*:*:*:*:*:*
cpe:2.3:a:sophos:anti-virus:6.0.4:*:*:*:*:*:*:*
cpe:2.3:a:sophos:endpoint_security:*:*:*:*:*:*:*:*

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Other CWE-399 (Resource Management Errors) vulnerabilities

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CVE-2015-0339 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
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