How severe is CVE-2009-0089?

CVE-2009-0089 has a CVSS 2.0 base score of 5.8, rated medium severity.

Is CVE-2009-0089 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0089?

CVE-2009-0089 primarily affects Microsoft Windows 2000. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0089?

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

When was CVE-2009-0089 published?

CVE-2009-0089 was published on 2009-04-15 and last updated on 2026-06-16.

CVE-2009-0089

CVE-2009-0089 is a medium-severity vulnerability in Microsoft Windows 2000 with a CVSS 2.0 base score of 5.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.8)
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Microsoft Windows 2000
Published: 2009-04-15
Last modified: 2026-06-16

Description

Windows HTTP Services (aka WinHTTP) in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP1 and SP2, and Vista Gold allows remote web servers to impersonate arbitrary https web sites by using DNS spoofing to "forward a connection" to a different https web site that has a valid certificate matching its own domain name, but not a certificate matching the domain name of the host requested by the user, aka "Windows HTTP Services Certificate Name Mismatch Vulnerability."

Frequently asked questions

What is CVE-2009-0089?: Windows HTTP Services (aka WinHTTP) in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP1 and SP2, and Vista Gold allows remote web servers to impersonate arbitrary https web sites by using DNS spoofing to "forward a connection" to a different https web site that has a valid certificate matching its own domain name, but not a certificate matching the domain name of the host requested by the user, aka "Windows HTTP Services Certificate Name Mismatch Vulnerability."
How severe is CVE-2009-0089?: CVE-2009-0089 has a CVSS 2.0 base score of 5.8, rated medium severity.
Is CVE-2009-0089 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0089?: CVE-2009-0089 primarily affects Microsoft Windows 2000. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0089?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-0089 published?: CVE-2009-0089 was published on 2009-04-15 and last updated on 2026-06-16.

References

Affected products (15)

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:*:*:itanium:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:*:*:x32:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:*:*:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:*:*:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:*:gold:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:*:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:*:pro_x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:sp2:pro_x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:sp3:*:*:*:*:*:*

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