# CVE-2004-2761

## Summary

- **CVE ID:** CVE-2004-2761
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** Jan 5, 2009
- **Last Modified:** May 28, 2026

## Description

The MD5 Message-Digest Algorithm is not collision resistant, which makes it easier for context-dependent attackers to conduct spoofing attacks, as demonstrated by attacks on the use of MD5 in the signature algorithm of an X.509 certificate.

## Affected Products

- n/a — n/a (n/a)

## References

- [CNA](http://www.securityfocus.com/bid/33065)
- [CNA](https://rhn.redhat.com/errata/RHSA-2010-0837.html)
- [CNA](http://www.phreedom.org/research/rogue-ca/)
- [CNA](http://www.kb.cert.org/vuls/id/836068)
- [CNA](http://securityreason.com/securityalert/4866)
- [CNA](http://blog.mozilla.com/security/2008/12/30/md5-weaknesses-could-lead-to-certificate-forgery/)
- [CNA](http://www.cisco.com/en/US/products/products_security_response09186a0080a5d24a.html)
- [CNA](http://www.win.tue.nl/hashclash/SoftIntCodeSign/)
- [CNA](http://secunia.com/advisories/33826)
- [CNA](http://secunia.com/advisories/34281)
- [CNA](http://www.microsoft.com/technet/security/advisory/961509.mspx)
- [CNA](https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03814en_us)
- [CNA](http://blogs.technet.com/swi/archive/2008/12/30/information-regarding-md5-collisions-problem.aspx)
- [CNA](http://www.doxpara.com/research/md5/md5_someday.pdf)
- [CNA](https://ics-cert.us-cert.gov/advisories/ICSMA-18-058-02)
- [CNA](https://rhn.redhat.com/errata/RHSA-2010-0838.html)
- [CNA](https://blogs.verisign.com/ssl-blog/2008/12/on_md5_vulnerabilities_and_mit.php)
- [CNA](http://www.ubuntu.com/usn/usn-740-1)
- [CNA](http://securitytracker.com/id?1024697)
- [CNA](https://www.redhat.com/archives/fedora-package-announce/2009-February/msg00096.html)
- [CNA](https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05336888)
- [CNA](http://www.securityfocus.com/archive/1/499685/100/0/threaded)
- [CNA](https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05289935)
- [CNA](http://secunia.com/advisories/42181)
- [CNA](http://www.win.tue.nl/hashclash/rogue-ca/)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=648886)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 6.23%
- **EPSS Percentile:** 90.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._