CVE-2011-0091: n/a vulnerability

CVE-2011-0091: Kerberos in Microsoft Windows Server 2008 R2 and Windows 7 does not prevent a session from changing from st...

Kerberos in Microsoft Windows Server 2008 R2 and Windows 7 does not prevent a session from changing from strong encryption to DES encryption, which allows man-in-the-middle attackers to spoof network traffic and obtain sensitive information via a DES downgrade, aka "Kerberos Spoofing Vulnerability."

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 21:43 UTC (UTC+00:00)

Security readout for executives and security teams

This vulnerability lets an attacker positioned on the network weaken Kerberos encryption from stronger protection to DES on Windows 7 or Windows Server 2008 R2. That downgrade can let them spoof network traffic and expose sensitive information. The source bundle does not show active exploitation. Exposure is most likely in legacy environments still running Windows 7 or Windows Server 2008 R2, especially where Kerberos authentication is used and DES remains possible. The bundle’s structured affected-product data is incomplete, so confirm against Microsoft MS11-013. Treat this as a legacy-platform risk. It is not KEV-listed in the supplied bundle, but exposed Windows 7 or Server 2008 R2 systems should be patched, isolated, or retired because Kerberos downgrade risks affect authentication trust. Mitigation focus: Review Microsoft MS11-013 and apply the applicable security update.; Inventory Windows 7 and Windows Server 2008 R2 systems.; Check whether DES use is still permitted in Kerberos policy..

Prepared: Jun 27, 2026, 18:32 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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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Feb 10, 2011, 15:00 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

4Source 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
ms-kerberos-spoofing(64901)CVE reference · vdb-entry, x_refsource_XF
MS11-013CVE reference · vendor-advisory, x_refsource_MS
oval:org.mitre.oval:def:12498CVE 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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