CVE-2012-1458: n/a vulnerability

CVE-2012-1458: The Microsoft CHM file parser in ClamAV 0.96.4 and Sophos Anti-Virus 4.61.0 allows remote attackers to bypa...

The Microsoft CHM file parser in ClamAV 0.96.4 and Sophos Anti-Virus 4.61.0 allows remote attackers to bypass malware detection via a crafted reset interval in the LZXC header of a CHM file. NOTE: this may later be SPLIT into multiple CVEs if additional information is published showing that the error occurred independently in different CHM parser implementations.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 19:01 UTC (UTC+00:00)

Security readout for executives and security teams

This CVE describes an antivirus evasion issue, not direct code execution. A specially crafted Microsoft CHM help file could make affected ClamAV 0.96.4 and Sophos Anti-Virus 4.61.0 miss malware during scanning. Business risk depends on whether these old engines still protect email, web downloads, or file uploads. Exposure is most likely in legacy antivirus deployments, old Linux distribution packages, mail gateways, file-ingestion services, or archival scanning systems still using the named versions or vendor-derived packages. Prioritize this if legacy antivirus still protects email or uploaded-file paths. For modern environments without these old versions, urgency is low, but the finding supports retiring unsupported security tooling. Mitigation focus: Identify any ClamAV 0.96.4 or Sophos Anti-Virus 4.61.0 deployments.; Review the cited openSUSE, Mandriva, ClamAV, and Sophos vendor guidance.; Upgrade or replace affected antivirus engines using vendor-supported versions..

Prepared: Jun 24, 2026, 12:52 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Mar 21, 2012, 10:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
multiple-av-chm-header-evasion(74301)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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