CVE-2010-0021

CVE-2010-0021 is a medium-severity vulnerability in Microsoft Windows 2000 with a CVSS 3.x base score of 5.9. Its EPSS exploit-prediction score of 14% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-362.

Key facts

• Severity: Medium (CVSS 3.x base score 5.9)
• CVSS v2: 7.1
• EPSS exploit prediction: 14% (96th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-362
• Affected product: Microsoft Windows 2000
• Published: 2010-02-10
• Last modified: 2026-06-16

Description

Multiple race conditions in the SMB implementation in the Server service in Microsoft Windows Vista Gold, SP1, and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7 allow remote attackers to cause a denial of service (system hang) via a crafted (1) SMBv1 or (2) SMBv2 Negotiate packet, aka "SMB Memory Corruption Vulnerability."

Frequently asked questions

What is CVE-2010-0021?

Multiple race conditions in the SMB implementation in the Server service in Microsoft Windows Vista Gold, SP1, and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7 allow remote attackers to cause a denial of service (system hang) via a crafted (1) SMBv1 or (2) SMBv2 Negotiate packet, aka "SMB Memory Corruption Vulnerability."

How severe is CVE-2010-0021?

CVE-2010-0021 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2010-0021 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-0021?

CVE-2010-0021 primarily affects Microsoft Windows 2000. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-0021?

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

When was CVE-2010-0021 published?

CVE-2010-0021 was published on 2010-02-10 and last updated on 2026-06-16.

References

• http://www.us-cert.gov/cas/techalerts/TA10-040A.html
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-012
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8524

Affected products (21)

• 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_7:-:*:*:*:*:*:*:*
• 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_server_2008:*:r2:itanium:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2008:*:r2:x64:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2008:*:sp2:x32:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2008:*:sp2:x64:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2008:-:sp2:itanium:*:*:*:*:*
• 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_xp:*:sp2:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_xp:*:sp2:pro_x64:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_xp:*:sp3:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_xp:-:sp2:x64:*:*:*:*:*

More vulnerabilities in Microsoft Windows 2000

• CVE-2010-0269 — Critical (CVSS 10.0): The SMB client in Microsoft Windows 2000 SP4, Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista Gold, SP1,…
• CVE-2010-0231 — Critical (CVSS 10.0): The SMB implementation in the Server service in Microsoft Windows 2000 SP4, Windows XP SP2 and SP3, Windows Server 2003…
• CVE-2009-3677 — Critical (CVSS 10.0): The Internet Authentication Service (IAS) in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold…
• CVE-2009-2523 — Critical (CVSS 10.0): The License Logging Server (llssrv.exe) in Microsoft Windows 2000 SP4 allows remote attackers to execute arbitrary code…
• CVE-2009-1925 — Critical (CVSS 10.0): The TCP/IP implementation in Microsoft Windows Vista Gold, SP1, and SP2 and Server 2008 Gold and SP2 does not properly…
• CVE-2009-1930 — Critical (CVSS 10.0): The Telnet service in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server…

All CVEs affecting Microsoft Windows 2000 →

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