Microsoft Internet Explorer Uninitialized Memory Corruption Vulnerability
n/a — n/a
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.
8.1
96.9%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- Nov 5, 2010
- Modified
- Oct 22, 2025
- Added to KEV
- Oct 6, 2025
- Federal patch due
- Oct 27, 2025
CISA required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2010-3962, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2010-3962 were found at last check. Absence here is not proof no exploit exists - see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-2010-3962?
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.
How severe is CVE-2010-3962?
CVE-2010-3962 has a CVSS base score of 8.1 out of 10 (CVSS 3.1).
Is CVE-2010-3962 actively exploited in the wild?
Yes. CVE-2010-3962 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Oct 6, 2025, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2010-3962?
96.9% - meaning FIRST.org's EPSS model estimates a 96.9% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
What type of vulnerability is CVE-2010-3962?
CVE-2010-3962 is classified under CWE-416 (CWE-416 Use After Free).
Cross-checked against
Impactr finds and proves whether CVE-2010-3962 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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