CVE-2010-3332
MediumExploitedPublic exploitMicrosoft .NET Framework 1.1 SP1, 2.0 SP1 and SP2, 3.5, 3.5 SP1, 3.5.1, and 4.0, as used for ASP.NET in Microsoft Internet Information Services (IIS), provides detailed error codes during decryption attempts, which allows remote attackers to decrypt and modify encrypted View…
Published Sep 22, 2010 · Updated Apr 28, 2026
Key Facts
Patch immediately- CVE-2010-3332 is a medium-severity vulnerability (CVSS 6.4 v2) affecting .net Framework (Microsoft).
- It is exploited in the wild, listed in Industry KEV feed since Oct 26, 2011. Public exploit code is available.
- EPSS estimates a 68% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v2
6.4
AV:N/AC:L/Au:N/C:P/I:P/A:N
EPSS (30-day exploit likelihood)
68%
Higher than 99.3% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2010-3332 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Microsoft .NET Framework 1.1 SP1, 2.0 SP1 and SP2, 3.5, 3.5 SP1, 3.5.1, and 4.0, as used for ASP.NET in Microsoft Internet Information Services (IIS), provides detailed error codes during decryption attempts, which allows remote attackers to decrypt and modify encrypted View State (aka VIEWSTATE) form data, and possibly forge cookies or read application files, via a padding oracle attack, aka "ASP.NET Padding Oracle Vulnerability."
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Oct 26, 2011 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
7 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| .net FrameworkMicrosoft | 1.1-sp1, 2.0-sp1, 2.0-sp2, 3.5, 3.5.1, 3.5-sp1, 4.0 | n/a |
Timeline
Publicly disclosed
Sep 22, 2010
Added to Industry KEV feed
Oct 26, 2011
Last updated
Apr 28, 2026
Weakness Type
- CWE-209 Generation of Error Message Containing Sensitive Information
References
- advisoryhttp://blogs.technet.com/b/srd/archive/2010/09/17/understanding-the-asp-net-vulnerability.aspx
- advisoryhttp://isc.sans.edu/diary.html?storyid=9568
- advisoryhttp://pentonizer.com/general-programming/aspnet-poet-vulnerability-what-else-can-i-do/
- advisory41409
- advisory1024459
FAQ
Common Questions.
Microsoft .NET Framework 1.1 SP1, 2.0 SP1 and SP2, 3.5, 3.5 SP1, 3.5.1, and 4.0, as used for ASP.NET in Microsoft Internet Information Services (IIS), provides detailed error codes during decryption attempts, which allows remote attackers to decrypt and modify encrypted View State (aka VIEWSTATE) form data, and possib…
Affected: .net Framework (Microsoft) versions 1.1-sp1, 2.0-sp1, 2.0-sp2, 3.5, 3.5.1, 3.5-sp1, 4.0. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Oct 26, 2011.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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