CVE-2012-4777 in the critical feed json
The code-optimization feature in the reflection implementation in Microsoft .NET Framework 4 and 4.5 does not properly enforce object permi…
published 2012-11-14 13 y ago modified 2026-06-16 4 mo ago also EUVD-2012-4702
- 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 code-optimization feature in the reflection implementation in Microsoft .NET Framework 4 and 4.5 does not properly enforce object permissions, which allows remote attackers to execute arbitrary code via (1) a crafted XAML browser application (aka XBAP) or (2) a crafted .NET Framework application, aka "WPF Reflection Optimization 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-264 Permissions, Privileges, and Access Controls
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
-
oval.cisecurity.org
/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15960
vdb-entry, signature
-
osvdb.org
/87267
vdb-entry
-
securityfocus.com
/bid/56464
vdb-entry
-
secunia.com
/advisories/51236
third-party-advisory
-
securitytracker.com
/id?1027753
vdb-entry
Sources
- CVE List CVE-2012-4777
- NVD CVE-2012-4777
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.