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CVE-2012-1458

56
FAUCET Score

CVE-2012-1458 describes a bypass vulnerability in the Microsoft CHM file parser used by ClamAV 0.96.4 and Sophos Anti-Virus 4.61.0, allowing remote attackers to evade malware detection through a specially crafted reset interval in a CHM file's LZXC header. This vulnerability has a CVSS score of 4.3, indicating a medium attack complexity and potential for partial integrity impact, with no confidentiality or availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
0.96.4CPE matchmatch criteria
cpe:2.3:a:clamav:clamav:0.96.4:*:*:*:*:*:*:*
4.61.0CPE matchmatch criteria
cpe:2.3:a:sophos:sophos_anti-virus:4.61.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
73.49%
Probability of exploitation in next 30 days
EPSS Percentile
99.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.7349 is in the 100th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

wagopatch availablevia llm_extracted
Fixed in: ['7.2.1']

Vendor Advisories (1)

wagollm-wago-64262388f2932937LOW

Upgrade to Clamav 0.97.5

References

lists.opensuse.org / opensuse-security-announce/2012-07/msg00002.html
osvdb.org / 80473
osvdb.org / 80474
exchange.xforce.ibmcloud.com / vulnerabilities/74301
ieee-security.org / TC/SP2012/program.html
mandriva.com / security/advisories
securityfocus.com / archive/1/522005
securityfocus.com / bid/52611