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CVE-2004-1099
Cisco Secure Access Control Server for Windows (ACS Windows) and Cisco Secure Access Control Server Solution Engine (ACS Solution Engine)…
High10.0EPSS 10.2%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
Cisco Secure Access Control Server for Windows (ACS Windows) and Cisco Secure Access Control Server Solution Engine (ACS Solution Engine) 3.3.1, when the EAP-TLS protocol is enabled, does not properly handle expired or untrusted certificates, which allows remote attackers to bypass authentication and gain unauthorized access via a "cryptographically correct" certificate with valid fields such as the username.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
- EPSS (exploitation in 30 days)
- 10.2% · top 4.3% of all CVEs (2 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 10.0.
Weakness
- n/a
Affected products
n/a
- affected n/a
References (4)
- 20041102 Vulnerability in Cisco Secure Access Control Server EAP-TLS Authentication (opens in a new tab)vendor-advisoryx_refsource_CISCOx_transferred
- ciscosecure-eaptls-auth-bypass(17936) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 11577 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- P-028 (opens in a new tab)third-party-advisorygovernment-resourcex_refsource_CIACx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Record last updated .