CVE-2012-4776 in the critical feed json
The Web Proxy Auto-Discovery (WPAD) functionality in Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, and 4.5 does not validate configurati…
published 2012-11-14 13 y ago modified 2026-06-16 4 mo ago also EUVD-2012-4701
- cvss
- 9.3
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 24.8%
- EPSS 24.8% chance of exploitation in 30 days, percentile 97%
- public exploits
- 0
- none known
Summary
The Web Proxy Auto-Discovery (WPAD) functionality in Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, and 4.5 does not validate configuration data that is returned during acquisition of proxy settings, which allows remote attackers to execute arbitrary JavaScript code by providing crafted data during execution of (1) an XAML browser application (aka XBAP) or (2) a .NET Framework application, aka "Web Proxy Auto-Discovery Vulnerability."
Exploit prediction
24.75% 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 | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
docs.microsoft.com
/en-us/security-updates/securitybulletins/2012/ms12-074
vendor-advisory
-
us-cert.gov
/cas/techalerts/TA12-318A.html
third-party-advisory, us-government-resource
-
securityfocus.com
/bid/56463
vdb-entry
-
oval.cisecurity.org
/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15810
vdb-entry, signature
-
osvdb.org
/87266
vdb-entry
-
secunia.com
/advisories/51236
third-party-advisory
-
securitytracker.com
/id?1027753
vdb-entry
Sources
- CVE List CVE-2012-4776
- NVD CVE-2012-4776
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.