CVE-2009-0094

CVE-2009-0094 is a medium-severity vulnerability in Microsoft Windows 2000 with a CVSS 2.0 base score of 5.5. Its EPSS exploit-prediction score of 23% places it in the 98th percentile, indicating an elevated likelihood of exploitation.

Key facts

• Severity: Medium (CVSS 2.0 base score 5.5)
• EPSS exploit prediction: 23% (98th percentile)
• Actively exploited: Not listed in CISA KEV
• Affected product: Microsoft Windows 2000
• Published: 2009-03-11
• Last modified: 2026-06-16

Description

The WINS server in Microsoft Windows 2000 SP4 and Server 2003 SP1 and SP2 does not restrict registration of the (1) "wpad" and (2) "isatap" NetBIOS names, which allows remote authenticated users to hijack the Web Proxy Auto-Discovery (WPAD) and Intra-Site Automatic Tunnel Addressing Protocol (ISATAP) features, and conduct man-in-the-middle attacks by spoofing a proxy server or ISATAP route, by registering one of these names in the WINS database, aka "WPAD WINS Server Registration Vulnerability," a related issue to CVE-2007-1692.

Frequently asked questions

What is CVE-2009-0094?

The WINS server in Microsoft Windows 2000 SP4 and Server 2003 SP1 and SP2 does not restrict registration of the (1) "wpad" and (2) "isatap" NetBIOS names, which allows remote authenticated users to hijack the Web Proxy Auto-Discovery (WPAD) and Intra-Site Automatic Tunnel Addressing Protocol (ISATAP) features, and conduct man-in-the-middle attacks by spoofing a proxy server or ISATAP route, by registering one of these names in the WINS database, aka "WPAD WINS Server Registration Vulnerability," a related issue to CVE-2007-1692.

How severe is CVE-2009-0094?

CVE-2009-0094 has a CVSS 2.0 base score of 5.5, rated medium severity.

Is CVE-2009-0094 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 23% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0094?

CVE-2009-0094 primarily affects Microsoft Windows 2000. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0094?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-0094 published?

CVE-2009-0094 was published on 2009-03-11 and last updated on 2026-06-16.

References

• http://blogs.technet.com/srd/archive/2009/03/13/ms09-008-dns-and-wins-server-security-update-in-more-detail.aspx
• http://osvdb.org/52520
• http://secunia.com/advisories/34217
• http://support.avaya.com/elmodocs2/security/ASA-2009-083.htm
• http://www.securityfocus.com/bid/34013
• http://www.securitytracker.com/id?1021829
• http://www.us-cert.gov/cas/techalerts/TA09-069A.html
• http://www.vupen.com/english/advisories/2009/0661
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-008
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6117

Affected products (7)

• cpe:2.3:o:microsoft:windows_2000:*:sp4:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2003:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2003:*:sp1:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2003:*:sp1:itanium:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2003:*:sp2:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2008:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2008:*:*:x64:*:*:*:*:*

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