Is CVE-2009-2505 in the CISA KEV catalog?

No. CVE-2009-2505 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-2505?

CVE-2009-2505 has a CVSS v2 base score of 10.0 (HIGH).

What is the EPSS score for CVE-2009-2505?

CVE-2009-2505 has an EPSS score of 31.61% (98th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2009-2505

HIGHEPSS 98th pctl

10.0

CVSS v2

NVD

Description

The Internet Authentication Service (IAS) in Microsoft Windows Vista SP2 and Server 2008 SP2 does not properly validate MS-CHAP v2 Protected Extensible Authentication Protocol (PEAP) authentication requests, which allows remote attackers to execute arbitrary code via crafted structures in a malformed request, aka "Internet Authentication Service Memory Corruption Vulnerability."

CWE-287Improper Authentication

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

31.61%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% 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 2026-04-23.