How severe is CVE-2006-5647?

CVE-2006-5647 has a CVSS 2.0 base score of 6.4, rated medium severity.

Is CVE-2006-5647 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-5647?

CVE-2006-5647 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-2006-5647?

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

When was CVE-2006-5647 published?

CVE-2006-5647 was published on 2006-11-01 and last updated on 2026-06-16.

CVE-2006-5647

CVE-2006-5647 is a medium-severity vulnerability in Sophos Anti-virus with a CVSS 2.0 base score of 6.4. Its EPSS exploit-prediction score of 21% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Severity: Medium (CVSS 2.0 base score 6.4)
EPSS exploit prediction: 21% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
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 allows remote attackers to cause a denial of service (memory corruption) and possibly execute arbitrary code via a malformed CHM file with a large name length in the CHM chunk header, aka "CHM name length memory consumption vulnerability."

Frequently asked questions

What is CVE-2006-5647?: Sophos 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 cause a denial of service (memory corruption) and possibly execute arbitrary code via a malformed CHM file with a large name length in the CHM chunk header, aka "CHM name length memory consumption vulnerability."
How severe is CVE-2006-5647?: CVE-2006-5647 has a CVSS 2.0 base score of 6.4, rated medium severity.
Is CVE-2006-5647 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-5647?: CVE-2006-5647 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-2006-5647?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-5647 published?: CVE-2006-5647 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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