CVE-2010-3962
Microsoft Internet Explorer Uninitialized Memory Corruption Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 27 October 2025). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
Use-after-free vulnerability in Microsoft Internet Explorer 6, 7, and 8 allows remote attackers to execute arbitrary code via vectors related to Cascading Style Sheets (CSS) token sequences and the clip attribute, aka an "invalid flag reference" issue or "Uninitialized Memory Corruption Vulnerability," as exploited in the wild in November 2010.
- CVSS 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 96.83% probability · 100th percentile
- Public exploits
- 3 in Exploit-DB · verified · first 4 November 2010
- CISA KEV
- Listed 6 October 2025 · due 27 October 2025
- Weakness
- CWE-416
- Affected
- microsoft/internet explorer
- Source
- secure@microsoft.com
EPSS 96.8% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. https://learn.microsoft.com/en-us/security-updates/SecurityAdvisories/2010/2458511?redirectedfrom=MSDN ; https://nvd.nist.gov/vuln/detail/CVE-2010-3962
Public exploits (3)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
| EDB-ID | Title | Type | Published | Verified |
|---|---|---|---|---|
| EDB-16551source ↗ | Microsoft Internet Explorer - CSS SetUserClip Memory Corruption (MS10-090) (Metasploit)windows · Metasploit | remote | 20 January 2011 | yes |
| EDB-15421source ↗ | Microsoft Internet Explorer 6/7/8 - Memory Corruptionwindows · ryujin | remote | 4 November 2010 | yes |
| EDB-15418source ↗ | Microsoft Internet Explorer - Memory Corruptionwindows · anonymous | dos | 4 November 2010 | yes |
References
- http://blogs.technet.com/b/msrc/archive/2010/11/02/microsoft-releases-security-advisory-2458511.aspxVendor Advisory
- http://secunia.com/advisories/42091Broken Link, Vendor Advisory
- http://www.exploit-db.com/exploits/15418Third Party Advisory, VDB Entry
- http://www.exploit-db.com/exploits/15421Third Party Advisory, VDB Entry
- http://www.kb.cert.org/vuls/id/899748Third Party Advisory, US Government Resource
- http://www.microsoft.com/technet/security/advisory/2458511.mspxPatch, Vendor Advisory
- http://www.securityfocus.com/bid/44536Broken Link, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id?1024676Broken Link, Third Party Advisory, VDB Entry
- http://www.symantec.com/connect/blogs/new-ie-0-day-used-targeted-attacksNot Applicable
- http://www.us-cert.gov/cas/techalerts/TA10-348A.htmlThird Party Advisory, US Government Resource
- http://www.vupen.com/english/advisories/2010/2880Broken Link, Vendor Advisory
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-090Patch, Vendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/62962Third Party Advisory, VDB Entry
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12279Tool Signature
- http://blogs.technet.com/b/msrc/archive/2010/11/02/microsoft-releases-security-advisory-2458511.aspxVendor Advisory
- http://secunia.com/advisories/42091Broken Link, Vendor Advisory
- http://www.exploit-db.com/exploits/15418Third Party Advisory, VDB Entry
- http://www.exploit-db.com/exploits/15421Third Party Advisory, VDB Entry
- http://www.kb.cert.org/vuls/id/899748Third Party Advisory, US Government Resource
- http://www.microsoft.com/technet/security/advisory/2458511.mspxPatch, Vendor Advisory
- http://www.securityfocus.com/bid/44536Broken Link, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id?1024676Broken Link, Third Party Advisory, VDB Entry
- http://www.symantec.com/connect/blogs/new-ie-0-day-used-targeted-attacksNot Applicable
- http://www.us-cert.gov/cas/techalerts/TA10-348A.htmlThird Party Advisory, US Government Resource
- http://www.vupen.com/english/advisories/2010/2880Broken Link, Vendor Advisory
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-090Patch, Vendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/62962Third Party Advisory, VDB Entry
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12279Tool Signature
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2010-3962US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.