CVE-2004-1099

Name: CVE-2004-1099
Creator: NVD / NIST
Published: 2005-01-10T05:00:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 10.20%

Last modified Jun 16, 2026

CVE-2004-1099 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 10.20% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

10.20%

95.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Cisco	Secure Access Control Server	3.3\(1\)
Cisco	Secure Access Control Server	3.3.1
Cisco	Secure Acs Solution Engine	All versions

References

http://www.ciac.org/ciac/bulletins/p-028.shtmlPatch, Vendor Advisory
http://www.cisco.com/warp/public/707/cisco-sa-20041102-acs-eap-tls.shtmlVendor Advisory
http://www.securityfocus.com/bid/11577Patch, Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/17936
http://www.ciac.org/ciac/bulletins/p-028.shtmlPatch, Vendor Advisory
http://www.cisco.com/warp/public/707/cisco-sa-20041102-acs-eap-tls.shtmlVendor Advisory
http://www.securityfocus.com/bid/11577Patch, Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/17936

Timeline

Published: Jan 10, 2005
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2004-1099?

How severe is CVE-2004-1099?

Severity scoring for CVE-2004-1099 is pending analysis. The EPSS model estimates a 10.20% probability of exploitation in the next 30 days.

How do I fix CVE-2004-1099?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2004-1099?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST