The SMB Server service in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold,…

Description

The SMB Server service in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 does not properly validate fields in SMB requests, which allows remote attackers to execute arbitrary code via a malformed request in a (1) SMBv1 or (2) SMBv2 packet, aka "SMB Transaction Parsing Vulnerability."

Scores

EPSS (exploitation in 30 days)

44.6% · top 1.2% of all CVEs (3 Nov 2026)

Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 10.0.

Weakness

• n/a
• CWE-20 (opens in a new tab)Other CVEs with CWE-20

Affected products

• n/a

  • affected n/a

References (8)

• 44072 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 71781 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
• TA11-102A (opens in a new tab)third-party-advisoryx_refsource_CERTx_transferred
• 1025329 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• ADV-2011-0939 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• 47198 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• oval:org.mitre.oval:def:12076 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• MS11-020 (opens in a new tab)vendor-advisoryx_refsource_MSx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2011-0661](https://trackcve.app/badge/CVE-2011-0661.svg)](https://trackcve.app/cve/CVE-2011-0661)

Record last updated 6 Aug 2024, 21:58 UTC.