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CVE-2011-0040
The server in Microsoft Active Directory on Windows Server 2003 SP2 does not properly handle an update request for a service principal…
Medium5.0EPSS 22.8%
- Published
- Updated
- Reserved
- Assigned by
- microsoft
Description
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."
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 22.8% · top 2.3% of all CVEs (2 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.
Weakness
Affected products
n/a
- affected n/a
References (8)
- MS11-005 (opens in a new tab)vendor-advisoryx_refsource_MSx_transferred
- 70825 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- ADV-2011-0319 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 1025042 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 43215 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- ms-win-active-directory-dos(64915) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 46145 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- oval:org.mitre.oval:def:12485 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Record last updated .