How severe is CVE-2009-1544?

CVE-2009-1544 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2009-1544 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-1544?

CVE-2009-1544 primarily affects Microsoft Windows 2003 Server. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-1544?

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-2009-1544 published?

CVE-2009-1544 was published on 2009-08-12 and last updated on 2026-06-16.

CVE-2009-1544

CVE-2009-1544 is a high-severity vulnerability in Microsoft Windows 2003 Server with a CVSS 3.x base score of 8.8. Its EPSS exploit-prediction score of 21% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-399.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 21% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Microsoft Windows 2003 Server
Published: 2009-08-12
Last modified: 2026-06-16

Description

Double free vulnerability in the Workstation service in Microsoft Windows allows remote authenticated users to gain privileges via a crafted RPC message to a Windows XP SP2 or SP3 or Server 2003 SP2 system, or cause a denial of service via a crafted RPC message to a Vista Gold, SP1, or SP2 or Server 2008 Gold or SP2 system, aka "Workstation Service Memory Corruption Vulnerability."

Frequently asked questions

What is CVE-2009-1544?: Double free vulnerability in the Workstation service in Microsoft Windows allows remote authenticated users to gain privileges via a crafted RPC message to a Windows XP SP2 or SP3 or Server 2003 SP2 system, or cause a denial of service via a crafted RPC message to a Vista Gold, SP1, or SP2 or Server 2008 Gold or SP2 system, aka "Workstation Service Memory Corruption Vulnerability."
How severe is CVE-2009-1544?: CVE-2009-1544 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2009-1544 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1544?: CVE-2009-1544 primarily affects Microsoft Windows 2003 Server. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-1544?: 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-2009-1544 published?: CVE-2009-1544 was published on 2009-08-12 and last updated on 2026-06-16.

References

Affected products (15)

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_server_2008:*:*:itanium:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:*:sp2:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:-:-:x32:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:-:-:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:itanium:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:x86:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:*:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:*:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:-:-:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:sp2:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:-:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:-:sp3:*:*:*:*:*:*

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