CVE-2011-3416 in the critical feed json
The Forms Authentication feature in the ASP.NET subsystem in Microsoft .NET Framework 1.1 SP1, 2.0 SP2, 3.5 SP1, 3.5.1, and 4.0 allows remo…
published 2011-12-30 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-3379
- cvss
- 8.5
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 43.7%
- EPSS 43.7% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known
Summary
The Forms Authentication feature in the ASP.NET subsystem in Microsoft .NET Framework 1.1 SP1, 2.0 SP2, 3.5 SP1, 3.5.1, and 4.0 allows remote authenticated users to obtain access to arbitrary user accounts via a crafted username, aka "ASP.Net Forms Authentication Bypass Vulnerability."
Exploit prediction
43.69% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 8.5 | AV:N/AC:M/Au:S/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-264 Permissions, Privileges, and Access Controls
References
-
docs.microsoft.com
/en-us/security-updates/securitybulletins/2011/ms11-100
vendor-advisory
-
oval.cisecurity.org
/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14363
vdb-entry, signature
-
us-cert.gov
/cas/techalerts/TA11-347A.html
third-party-advisory, us-government-resource
Sources
- CVE List CVE-2011-3416
- NVD CVE-2011-3416
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.