Is CVE-2004-1099 in the CISA KEV catalog?

No. CVE-2004-1099 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2004-1099?

CVE-2004-1099 has a CVSS v2 base score of 10.0 (HIGH).

What is the EPSS score for CVE-2004-1099?

CVE-2004-1099 has an EPSS score of 10.20% (95th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2004-1099

HIGHEPSS 95th pctl

10.0

CVSS v2

NVD

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.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

10.20%probability of exploitation in 30 days

95thpercentile

Very high risk: more likely to be exploited than 95% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-16.