How severe is CVE-2009-0093?

CVE-2009-0093 has a CVSS 2.0 base score of 3.5, rated low severity.

Is CVE-2009-0093 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0093?

CVE-2009-0093 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-2009-0093?

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

When was CVE-2009-0093 published?

CVE-2009-0093 was published on 2009-03-11 and last updated on 2026-06-16.

CVE-2009-0093

CVE-2009-0093 is a low-severity vulnerability in Microsoft Windows 2000 with a CVSS 2.0 base score of 3.5. Its EPSS exploit-prediction score of 17% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: Low (CVSS 2.0 base score 3.5)
EPSS exploit prediction: 17% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Microsoft Windows 2000
Published: 2009-03-11
Last modified: 2026-06-16

Description

Windows DNS Server in Microsoft Windows 2000 SP4, Server 2003 SP1 and SP2, and Server 2008, when dynamic updates are enabled, does not restrict registration of the "wpad" hostname, which allows remote authenticated users to hijack the Web Proxy Auto-Discovery (WPAD) feature, and conduct man-in-the-middle attacks by spoofing a proxy server, via a Dynamic Update request for this hostname, aka "DNS Server Vulnerability in WPAD Registration Vulnerability," a related issue to CVE-2007-1692.

Frequently asked questions

What is CVE-2009-0093?: Windows DNS Server in Microsoft Windows 2000 SP4, Server 2003 SP1 and SP2, and Server 2008, when dynamic updates are enabled, does not restrict registration of the "wpad" hostname, which allows remote authenticated users to hijack the Web Proxy Auto-Discovery (WPAD) feature, and conduct man-in-the-middle attacks by spoofing a proxy server, via a Dynamic Update request for this hostname, aka "DNS Server Vulnerability in WPAD Registration Vulnerability," a related issue to CVE-2007-1692.
How severe is CVE-2009-0093?: CVE-2009-0093 has a CVSS 2.0 base score of 3.5, rated low severity.
Is CVE-2009-0093 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0093?: CVE-2009-0093 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-2009-0093?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-0093 published?: CVE-2009-0093 was published on 2009-03-11 and last updated on 2026-06-16.

References

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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