CVE-2011-0040 json
The server in Microsoft Active Directory on Windows Server 2003 SP2 does not properly handle an update request for a service principal name…
published 2011-02-09 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-0066
- cvss
- 5.0
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 22.8%
- EPSS 22.8% chance of exploitation in 30 days, percentile 97%
- public exploits
- 0
- none known
Summary
The server in Microsoft Active Directory on Windows Server 2003 SP2 does not properly handle an update request for a service principal name (SPN), which allows remote attackers to cause a denial of service (authentication downgrade or outage) via a crafted request that triggers name collisions, aka "Active Directory SPN Validation Vulnerability."
Exploit prediction
22.76% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
docs.microsoft.com
/en-us/security-updates/securitybulletins/2011/ms11-005
vendor-advisory
-
vupen.com
/english/advisories/2011/0319
vdb-entry, vendor-advisory
-
secunia.com
/advisories/43215
third-party-advisory, vendor-advisory
-
osvdb.org
/70825
vdb-entry
-
securitytracker.com
/id?1025042
vdb-entry
-
exchange.xforce.ibmcloud.com
/vulnerabilities/64915
vdb-entry
-
securityfocus.com
/bid/46145
vdb-entry
-
oval.cisecurity.org
/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12485
vdb-entry, signature
Sources
- CVE List CVE-2011-0040
- NVD CVE-2011-0040
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.