CVE-2011-0661: n/a vulnerability

CVE-2011-0661: The SMB Server service in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and...

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."

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 21:58 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2011-0661 is a Windows SMB Server flaw that could let a remote attacker run code by sending malformed SMB traffic. It affects older Windows desktop and server releases listed in the CVE. Business risk is highest where legacy Windows systems still expose SMB services. Exposure is most likely on legacy Windows XP, Server 2003, Vista, Server 2008, and Windows 7 systems still running SMB Server. Internet-facing SMB, flat internal networks, and unsupported operating systems increase practical risk. Treat this as high priority for legacy environments. Remote code execution in SMB can create serious operational and lateral-movement risk, but urgency should be based on whether affected systems remain present and reachable. Mitigation focus: Review Microsoft MS11-020 guidance for affected systems and updates.; Retire or isolate unsupported Windows versions where patching is unavailable.; Restrict SMB access to trusted hosts and internal segments only..

Prepared: Jun 24, 2026, 13:28 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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description · low confidence lookup

Execution behavior lookup

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cve · low confidence lookup

CVE-2011-0661 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Apr 13, 2011, 18:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
oval:org.mitre.oval:def:12076CVE reference · vdb-entry, signature
MS11-020CVE reference · vendor-advisory, x_refsource_MS

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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