CVE-2010-3962

8.1 HIGH 97% exploit odds exploited in the wild Fix listed Memory safety Browser & mail

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
In the wild: CISA lists this as exploited in real attacks. Treat as urgent.
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2010-10-14 00:00 UTC ReservedThe CVE id was reserved by its CNA
2010-11-05 17:00 UTC PublishedDisclosed publicly on CVE.org and NVD
2025-10-06 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
2025-10-27 Remediation deadlineCISA's due date for federal agencies to fix it
2026-06-16 23:23 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
Exploit odds: 96.8% in the next 30 days (EPSS).
Severity: 8.1 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2010-11-05 17:00 UTC
Last modified: 2026-06-16 23:23 UTC
Added to CISA KEV: 2025-10-06
Exploit probability: 96.8% · EPSS, next 30 days
Weakness: CWE-416 · Use after free
Record status: Analyzed

Affected

Microsoft Internet Explorer 6
Microsoft Internet Explorer 7
Microsoft Internet Explorer 8

Attack profile CVSS 3.1 · 8.1

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Raw vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2010-3962.md and follow it. Check whether this project is affected by CVE-2010-3962. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record