How severe is CVE-2010-3962?

CVE-2010-3962 has a CVSS 3.1 base score of 8.1 (HIGH). EPSS estimates a 96.8% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2010-3962: Microsoft Internet Explorer Uninitialized Memory

CISA Known Exploited Vulnerabilities

Microsoft Internet Explorer Uninitialized Memory Corruption Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2025-10-06

Remediation due

2025-10-27

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.

CISA notes
https://learn.microsoft.com/en-us/security-updates/SecurityAdvisories/2010/2458511?redirectedfrom=MSDN ; https://nvd.nist.gov/vuln/detail/CVE-2010-3962

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.

Severity

CVSS 3.1 · CISA8.1 HIGH

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

SSVC · CISA-ADP

Exploitationactive

Automatableyes

Technical impacttotal

Affected Products

Vendor	Product	Affected versions
-	-	n/a

References

14 Links

Vendor advisories

MS10-090

Exploits & PoCs

Third-party advisories

Vulnerability databases

Other references

Record Details

Published

2010-11-05

Last updated

2025-10-22

Assigner (CNA)

microsoft

Credited to

CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.