Microsoft · Internet Explorer
CVE-2010-3962
Microsoft Internet Explorer Uninitialized Memory Corruption Vulnerability
What it is
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.
CISA: Microsoft Internet Explorer contains an uninitialized memory corruption vulnerability that could allow for remote code execution. The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Deadline for US federal agencies: October 27, 2025
- Added to the CISA list
- October 6, 2025
- Published
- November 5, 2010
- Severity
- High 8.1 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- 97% in the top 0.1% of all known vulnerabilities
- More details
- NVD · CVE.org · CISA
All references (14)
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-090
- http://www.securityfocus.com/bid/44536
- http://www.us-cert.gov/cas/techalerts/TA10-348A.html
- http://www.kb.cert.org/vuls/id/899748
- http://secunia.com/advisories/42091
- http://www.vupen.com/english/advisories/2010/2880
- http://www.microsoft.com/technet/security/advisory/2458511.mspx
- http://www.securitytracker.com/id?1024676
- http://www.exploit-db.com/exploits/15421
- http://www.symantec.com/connect/blogs/new-ie-0-day-used-targeted-attacks
- https://exchange.xforce.ibmcloud.com/vulnerabilities/62962
- http://blogs.technet.com/b/msrc/archive/2010/11/02/microsoft-releases-security-advisory-2458511.aspx
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12279
- http://www.exploit-db.com/exploits/15418
More exploited flaws from Microsoft
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| May 20, 2026 | Use-After-Free | Internet Explorer | High 8.8 | 92% |
| May 20, 2026 | Use-After-Free | Internet Explorer | High 8.8 | 82% |
| Aug 12, 2025 | Resource Management Errors | Internet Explorer | High 8.8 | 88% |
| Jul 23, 2024 | Use-After-Free | Internet Explorer | High 8.8 | 79% |
| Mar 30, 2023 | Memory Corruption | Internet Explorer | High 8.8 | 71% |
| Jun 8, 2022 | Use-After-Free | Internet Explorer | High 8.1 | 80% |
| May 25, 2022 | Information Disclosure | Internet Explorer | Medium 6.5 | 50% |
| May 25, 2022 | Privilege Escalation | Internet Explorer | High 8.8 | 26% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.