CVE-2010-3962: Microsoft Internet Explorer Uninitialized Memory Corruption Vulnerability

Severity: critical (CVSS 9.3 v2.0)
Exploited in the wild: yes — in CISA KEV since 2025-10-06
EPSS: 96.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2010-11-05 · updated 2026-06-16
Weakness: CWE-416

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.

Affected products

Microsoft Internet Explorer 11: 6, 7, 8

References

http://blogs.technet.com/b/msrc/archive/2010/11/02/microsoft-releases-security-advisory-2458511.aspx
http://secunia.com/advisories/42091
http://www.exploit-db.com/exploits/15418
http://www.exploit-db.com/exploits/15421
http://www.kb.cert.org/vuls/id/899748
http://www.microsoft.com/technet/security/advisory/2458511.mspx
http://www.securityfocus.com/bid/44536
http://www.securitytracker.com/id?1024676
http://www.symantec.com/connect/blogs/new-ie-0-day-used-targeted-attacks
http://www.us-cert.gov/cas/techalerts/TA10-348A.html
http://www.vupen.com/english/advisories/2010/2880
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-090

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