How severe is CVE-2012-1458?

CVE-2012-1458 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2012-1458 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 74% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-1458?

CVE-2012-1458 primarily affects Clamav. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-1458?

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

When was CVE-2012-1458 published?

CVE-2012-1458 was published on 2012-03-21 and last updated on 2026-06-16.

CVE-2012-1458

CVE-2012-1458 is a medium-severity vulnerability in Clamav with a CVSS 2.0 base score of 4.3. Its EPSS exploit-prediction score of 74% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-264.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 74% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Clamav
Published: 2012-03-21
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2012-1458?: 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.
How severe is CVE-2012-1458?: CVE-2012-1458 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2012-1458 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 74% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-1458?: CVE-2012-1458 primarily affects Clamav. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-1458?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-1458 published?: CVE-2012-1458 was published on 2012-03-21 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:clamav:clamav:0.96.4:*:*:*:*:*:*:*
cpe:2.3:a:sophos:sophos_anti-virus:4.61.0:*:*:*:*:*:*:*

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