CVE-2011-0091 json
Kerberos in Microsoft Windows Server 2008 R2 and Windows 7 does not prevent a session from changing from strong encryption to DES encryptio…
published 2011-02-10 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-0117
- cvss
- 6.4
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 5.5%
- EPSS 5.5% chance of exploitation in 30 days, percentile 92%
- public exploits
- 0
- none known
Summary
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."
Exploit prediction
5.49% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 6.4 | AV:N/AC:L/Au:N/C:P/I:P/A:N |
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
docs.microsoft.com
/en-us/security-updates/securitybulletins/2011/ms11-013
vendor-advisory
-
securityfocus.com
/bid/46140
vdb-entry
-
osvdb.org
/70835
vdb-entry
- support.avaya.com /css/P8/documents/100127250
-
secunia.com
/advisories/43257
third-party-advisory
-
exchange.xforce.ibmcloud.com
/vulnerabilities/64901
vdb-entry
-
vupen.com
/english/advisories/2011/0326
vdb-entry
-
securitytracker.com
/id?1025048
vdb-entry
-
oval.cisecurity.org
/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12498
vdb-entry, signature
Sources
- CVE List CVE-2011-0091
- NVD CVE-2011-0091
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.