How severe is CVE-2011-0039?

CVE-2011-0039 has a CVSS 2.0 base score of 7.2, rated high severity.

Is CVE-2011-0039 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-0039?

CVE-2011-0039 primarily affects Microsoft Windows 2003 Server. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-0039?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2011-0039 published?

CVE-2011-0039 was published on 2011-02-09 and last updated on 2026-06-16.

CVE-2011-0039

CVE-2011-0039 is a high-severity vulnerability in Microsoft Windows 2003 Server with a CVSS 2.0 base score of 7.2. 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-287.

Key facts

Severity: High (CVSS 2.0 base score 7.2)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Microsoft Windows 2003 Server
Published: 2011-02-09
Last modified: 2026-06-16

Description

The Local Security Authority Subsystem Service (LSASS) in Microsoft Windows XP SP2 and SP3 and Server 2003 SP2 does not properly process authentication requests, which allows local users to gain privileges via a request with a crafted length, aka "LSASS Length Validation Vulnerability."

Frequently asked questions

What is CVE-2011-0039?: The Local Security Authority Subsystem Service (LSASS) in Microsoft Windows XP SP2 and SP3 and Server 2003 SP2 does not properly process authentication requests, which allows local users to gain privileges via a request with a crafted length, aka "LSASS Length Validation Vulnerability."
How severe is CVE-2011-0039?: CVE-2011-0039 has a CVSS 2.0 base score of 7.2, rated high severity.
Is CVE-2011-0039 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-0039?: CVE-2011-0039 primarily affects Microsoft Windows 2003 Server. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-0039?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2011-0039 published?: CVE-2011-0039 was published on 2011-02-09 and last updated on 2026-06-16.

References

Affected products (5)

cpe:2.3:o:microsoft:windows_2003_server:*:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2003_server:*:sp2:itanium:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2003_server:*:sp2:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:sp3:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:-:sp2:x64:*:*:*:*:*

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