---
title: "CVE-2012-1458: The Microsoft CHM file parser in ClamAV… | CubePath"
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…"
language: en
source: https://cubepath.com/security/cve/CVE-2012-1458
---

# CVE-2012-1458: The Microsoft CHM file parser in ClamAV… | CubePath

## 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.

Official description from the CVE record, published by mitre. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2012-1458)

## Key data

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.72853 (72.9% probability)

Percentile

99.5%

Scores of

Nov 10, 2026

Model

v2026.06.15

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [openSUSE-SU-2012:0833](http://lists.opensuse.org/opensuse-security-announce/2012-07/msg00002.html)  (lists.opensuse.org) vendor-advisory
- [20120319 Evasion attacks expoliting file-parsing vulnerabilities in antivirus products](http://www.securityfocus.com/archive/1/522005)  (securityfocus.com) mailing-list
- [52611](http://www.securityfocus.com/bid/52611)  (securityfocus.com) vdb-entry
- [80473](http://osvdb.org/80473)  (osvdb.org) vdb-entry
- [ieee-security.org/TC/SP2012/program.html](http://www.ieee-security.org/TC/SP2012/program.html)
- [multiple-av-chm-header-evasion(74301)](https://exchange.xforce.ibmcloud.com/vulnerabilities/74301)  (exchange.xforce.ibmcloud.com) vdb-entry
- [80474](http://osvdb.org/80474)  (osvdb.org) vdb-entry
- [MDVSA-2012:094](http://www.mandriva.com/security/advisories?name=MDVSA-2012:094)  (mandriva.com) vendor-advisory

## Timeline

1. ID reserved Feb 29, 2012
2. Record published Mar 21, 2012
3. Record last updated Aug 6, 2024

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:58 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)