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CVE Record

CVE-2011-0087: win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Server 2003 SP2, Vista SP1 and S...

win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Server 2003 SP2, Vista SP1 and SP2, and Server 2008 Gold and SP2 does not properly validate user-mode input, which allows local users to gain privileges via a crafted application, aka "Win32k Insufficient User Input Validation Vulnerability."

UnknownCVSS not scoredNot KEV-listedUpdated
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2011-0087 is a Windows kernel driver flaw that could let someone already able to run a program on an affected machine gain higher privileges. The business risk is mainly legacy Windows exposure: compromised local accounts or malware could become more powerful on old systems.

Executive priority

Treat this as a legacy-platform privilege escalation risk. It is most urgent where old Windows machines support critical services, shared user access, or weak malware controls.

Technical view

The issue is in win32k.sys kernel-mode drivers and involves insufficient validation of user-mode input. A crafted local application can trigger privilege escalation on listed Windows XP, Server 2003, Vista, and Server 2008 versions. The provided sources do not include CVSS details.

Likely exposure

Exposure is most likely on legacy Windows XP SP2/SP3, Server 2003 SP2, Vista SP1/SP2, and Server 2008 Gold/SP2 systems that lack the Microsoft MS11-012 update or remain unsupported.

Exploitation context

The source bundle describes local privilege escalation through a crafted application. It does not support remote exploitation claims, and KEV is false, so active exploitation should not be assumed from these sources.

Researcher notes

Evidence is strongest for affected platforms, component, and local privilege-escalation impact. Severity scoring, exploit maturity, and detailed patch mechanics are incomplete in the provided bundle; defer to MS11-012 and OVAL content for implementation checks.

Mitigation direction

  • Review Microsoft MS11-012 and apply the relevant security update where applicable.
  • Prioritize retirement or isolation of unsupported affected Windows systems.
  • Limit local code execution paths on legacy hosts until remediation is confirmed.
  • Verify endpoint controls cover unauthorized program execution on exposed systems.

Validation and detection

  • Inventory systems for the affected Windows versions listed in the CVE description.
  • Check patch records for Microsoft MS11-012 coverage on applicable hosts.
  • Use the referenced OVAL definition where compatible with your scanning stack.
  • Confirm legacy systems are not exposed to untrusted local users or software.
Prepared
Confidence
medium
Sources
4

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

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2011-0087 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.