Is CVE-2009-2510 in the CISA KEV catalog?

No. CVE-2009-2510 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-2510?

CVE-2009-2510 has a CVSS v2 base score of 6.8 (MEDIUM).

What is the EPSS score for CVE-2009-2510?

CVE-2009-2510 has an EPSS score of 5.32% (92th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2009-2510?

No published fix for CVE-2009-2510 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2009-2510

MEDIUMEPSS 92th pctl

6.8

CVSS v2

NVD

Description

The CryptoAPI component in Microsoft Windows 2000 SP4, Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista Gold, SP1, and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7, as used by Internet Explorer and other applications, does not properly handle a '\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, aka "Null Truncation in X.509 Common Name Vulnerability," a related issue to CVE-2009-2408.

CWE-310Cryptographic Issues

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

5.32%probability of exploitation in 30 days

92ndpercentile

High risk: more likely to be exploited than 92% of all known CVEs.

References

Government Resource1

us-cert.gov

Other references6

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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.