How severe is CVE-2009-0568?

CVE-2009-0568 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2009-0568 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 32% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0568?

CVE-2009-0568 primarily affects Microsoft Windows 2000. In total, 18 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0568?

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

When was CVE-2009-0568 published?

CVE-2009-0568 was published on 2009-06-10 and last updated on 2026-06-16.

CVE-2009-0568

CVE-2009-0568 is a critical-severity vulnerability in Microsoft Windows 2000 with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 32% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-264.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 32% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Microsoft Windows 2000
Published: 2009-06-10
Last modified: 2026-06-16

Description

The RPC Marshalling Engine (aka NDR) in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 SP2 does not properly maintain its internal state, which allows remote attackers to overwrite arbitrary memory locations via a crafted RPC message that triggers incorrect pointer reading, related to "IDL interfaces containing a non-conformant varying array" and FC_SMVARRAY, FC_LGVARRAY, FC_VARIABLE_REPEAT, and FC_VARIABLE_OFFSET, aka "RPC Marshalling Engine Vulnerability."

Frequently asked questions

What is CVE-2009-0568?: The RPC Marshalling Engine (aka NDR) in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 SP2 does not properly maintain its internal state, which allows remote attackers to overwrite arbitrary memory locations via a crafted RPC message that triggers incorrect pointer reading, related to "IDL interfaces containing a non-conformant varying array" and FC_SMVARRAY, FC_LGVARRAY, FC_VARIABLE_REPEAT, and FC_VARIABLE_OFFSET, aka "RPC Marshalling Engine Vulnerability."
How severe is CVE-2009-0568?: CVE-2009-0568 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2009-0568 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 32% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0568?: CVE-2009-0568 primarily affects Microsoft Windows 2000. In total, 18 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0568?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2009-0568 published?: CVE-2009-0568 was published on 2009-06-10 and last updated on 2026-06-16.

References

Affected products (18)

cpe:2.3:o:microsoft:windows_2000:*:sp4:*:*:*:*:*:*
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:*:*:*:itanium:*
cpe:2.3:o:microsoft:windows_server_2008:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2008:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_server_2008:*:sp2:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2008:*:sp2:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_vista:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_vista:*:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:*:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:sp2:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_xp:*:sp3:*:*:*:*:*:*

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