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."
Published Nov 14, 2012
9.3
HIGHCVSS 2.0
EPSS 24.75%
Description
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."
Affected products
No data.
Configuration 1
- 2.0
Running on/with
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
Configuration 2
- 3.5.1
Configuration 3
- 4.0
Running on/with
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
Configuration 4
- 3.5
Configuration 5
- 4.5
Running on/with
- n/a
- n/a
- n/a
- n/a
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 24.75% (0.24755) | 97.84th | v5 (v2026.06.15) |
| Jun 15, 2026 | 24.75% (0.24755) | 97.61th | v5 (v2026.06.15) |
| Jan 27, 2026 | 45.02% (0.45019) | 97.48th | v4 (v2025.03.14) |
| Mar 30, 2025 | 48.83% (0.48826) | 97.53th | v4 (v2025.03.14) |
| Mar 29, 2025 | 67.28% (0.67282) | 98.02th | v4 (v2025.03.14) |
| Mar 17, 2025 | 49.26% (0.49257) | 97.51th | v4 (v2025.03.14) |
| Dec 17, 2024 | 96.42% (0.96424) | 99.71th | v3 (v2023.03.01) |
| Feb 7, 2024 | 93.29% (0.93289) | 98.90th | v3 (v2023.03.01) |
| Dec 8, 2023 | 93.70% (0.93701) | 98.90th | v3 (v2023.03.01) |
| Oct 4, 2023 | 94.50% (0.94502) | 98.95th | v3 (v2023.03.01) |
| Aug 1, 2023 | 94.81% (0.94810) | 98.92th | v3 (v2023.03.01) |
| Jun 1, 2023 | 93.85% (0.93854) | 98.70th | v3 (v2023.03.01) |
| Apr 8, 2023 | 95.00% (0.94996) | 98.84th | v3 (v2023.03.01) |
| Mar 7, 2023 | 94.76% (0.94763) | 98.74th | v3 (v2023.03.01) |
| Mar 6, 2023 | 58.14% (0.58141) | 98.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 58.14% (0.58141) | 98.52th | v2 (v2022.01.01) |
References (7)
- http://osvdb.org/87266 vdb-entryx_refsource_OSVDB
- http://secunia.com/advisories/51236 third-party-advisoryx_refsource_SECUNIA
- http://www.securityfocus.com/bid/56463 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id?1027753 vdb-entryx_refsource_SECTRACK
- http://www.us-cert.gov/cas/techalerts/TA12-318A.html third-party-advisoryx_refsource_CERTUS Government Resource
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-074 vendor-advisoryx_refsource_MS
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15810 vdb-entrysignaturex_refsource_OVAL
| Link | Providers | Tags |
|---|---|---|
| http://osvdb.org/87266 | vdb-entryx_refsource_OSVDB | |
| http://secunia.com/advisories/51236 | third-party-advisoryx_refsource_SECUNIA | |
| http://www.securityfocus.com/bid/56463 | vdb-entryx_refsource_BID | |
| http://www.securitytracker.com/id?1027753 | vdb-entryx_refsource_SECTRACK | |
| http://www.us-cert.gov/cas/techalerts/TA12-318A.html | third-party-advisoryx_refsource_CERTUS Government Resource | |
| https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-074 | vendor-advisoryx_refsource_MS | |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15810 | vdb-entrysignaturex_refsource_OVAL |
Change history (0)
No recorded changes yet.