CVE-2007-2228

CVE-2007-2228 is a high-severity vulnerability in Microsoft Windows 2000 with a CVSS 2.0 base score of 7.8. Its EPSS exploit-prediction score of 43% places it in the 99th percentile, indicating an elevated likelihood of exploitation.

Key facts

• Severity: High (CVSS 2.0 base score 7.8)
• EPSS exploit prediction: 43% (99th percentile)
• Actively exploited: Not listed in CISA KEV
• Affected product: Microsoft Windows 2000
• Published: 2007-10-09
• Last modified: 2026-06-16

Description

rpcrt4.dll (aka the RPC runtime library) in Microsoft Windows XP SP2, XP Professional x64 Edition, Server 2003 SP1 and SP2, Server 2003 x64 Edition and x64 Edition SP2, and Vista and Vista x64 Edition allows remote attackers to cause a denial of service (RPCSS service stop and system restart) via an RPC request that uses NTLMSSP PACKET authentication with a zero-valued verification trailer signature, which triggers an invalid dereference. NOTE: this also affects Windows 2000 SP4, although the impact is an information leak.

Frequently asked questions

What is CVE-2007-2228?

rpcrt4.dll (aka the RPC runtime library) in Microsoft Windows XP SP2, XP Professional x64 Edition, Server 2003 SP1 and SP2, Server 2003 x64 Edition and x64 Edition SP2, and Vista and Vista x64 Edition allows remote attackers to cause a denial of service (RPCSS service stop and system restart) via an RPC request that uses NTLMSSP PACKET authentication with a zero-valued verification trailer signature, which triggers an invalid dereference. NOTE: this also affects Windows 2000 SP4, although the impact is an information leak.

How severe is CVE-2007-2228?

CVE-2007-2228 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2007-2228 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 43% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-2228?

CVE-2007-2228 primarily affects Microsoft Windows 2000. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-2228?

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-2007-2228 published?

CVE-2007-2228 was published on 2007-10-09 and last updated on 2026-06-16.

References

• http://secunia.com/advisories/27134
• http://secunia.com/advisories/27153
• http://securitytracker.com/id?1018787
• http://www.securityfocus.com/archive/1/482023/100/0/threaded
• http://www.securityfocus.com/archive/1/482366/100/0/threaded
• http://www.securityfocus.com/bid/25974
• http://www.us-cert.gov/cas/techalerts/TA07-282A.html
• http://www.vupen.com/english/advisories/2007/3438
• http://www.zerodayinitiative.com/advisories/ZDI-07-055.html
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-058
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2310

Affected products (9)

• cpe:2.3:o:microsoft:windows_2000:*:sp4:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_2003_server:*:*:x64:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_2003_server:*:sp1:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_2003_server:*:sp2:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_2003_server:*:sp2:x64:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_vista:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_vista:*:*:x64:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_xp:*:*:professional:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_xp:*:sp2:*:*:*:*:*:*

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