CVE-2006-6696: n/a vulnerability

CVE-2006-6696: Double free vulnerability in Microsoft Windows 2000, XP, 2003, and Vista allows local users to gain privile...

Double free vulnerability in Microsoft Windows 2000, XP, 2003, and Vista allows local users to gain privileges by calling the MessageBox function with a MB_SERVICE_NOTIFICATION message with crafted data, which sends a HardError message to Client/Server Runtime Server Subsystem (CSRSS) process, which is not properly handled when invoking the UserHardError and GetHardErrorText functions in WINSRV.DLL.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 20:34 UTC (UTC+00:00)

Security readout for executives and security teams

This is a Windows local privilege escalation flaw from 2006. A logged-in local user could trigger a CSRSS/WINSRV.DLL double-free path and potentially gain higher privileges. It matters mainly where obsolete Windows 2000, XP, Server 2003, or Vista systems remain in service. Exposure is limited to systems running the old Windows versions named in the CVE description. Modern supported Windows versions are not identified in the provided bundle. Risk is concentrated in legacy endpoints, lab systems, embedded deployments, and unmanaged OT environments. Prioritize urgently only if these obsolete Windows systems still exist. The vulnerability can turn local access into higher privileges, but the main business issue is unmanaged legacy exposure rather than broad modern Windows risk. Mitigation focus: Apply Microsoft guidance from MS07-021 where applicable.; Remove or isolate Windows 2000, XP, Server 2003, and Vista systems.; Restrict local interactive access on remaining legacy hosts..

Prepared: Jun 29, 2026, 08:30 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

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Dec 22, 2006, 02:00 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
MS07-021CVE reference · vendor-advisory, x_refsource_MS
oval:org.mitre.oval:def:1816CVE reference · vdb-entry, signature

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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