Known exploited vulnerability
CVE-2010-3962
The short answer
CVE-2010-3962 affects n/a n/a and is rated high (CVSS 8.1). CISA added it to the Known Exploited Vulnerabilities catalog on 2025-10-06: attackers are using it, so patch it first. The vendor has linked a patch.
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.
Weakness: CWE-416.
Severity
8.1 high
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Oct 6, 2025
Federal due date Oct 27, 2025
EPSS, next 30 days
97%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says 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.
Affected products
n/a. NVD's record lists the exact affected versions.
References
- docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-090 PatchVendor Advisory
- exchange.xforce.ibmcloud.com/vulnerabilities/62962 Third Party AdvisoryVDB Entry
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12279 Tool Signature
- docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-090 PatchVendor Advisory
- exchange.xforce.ibmcloud.com/vulnerabilities/62962 Third Party AdvisoryVDB Entry
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12279 Tool Signature
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2010-3962 US Government Resource
Questions
Is CVE-2010-3962 being exploited?
Yes. CISA added CVE-2010-3962 to its Known Exploited Vulnerabilities catalog on 2025-10-06, with a federal remediation due date of 2025-10-27.
How do I fix CVE-2010-3962?
CISA's 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.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
Related
Latest CVEs this week
Critical and High CVEs from the last 7 days, with KEV and EPSS.
Exploited vulnerabilities by vendor
Every vendor in CISA's KEV catalog, with its count.
Microsoft exploited vulnerabilities
Everything CISA lists as exploited for Microsoft.
Vulnerability watch
A briefing and a fix pull request when an advisory hits your dependencies.
Know the day a CVE lands in your code
Connect a GitHub repository and ZeusQA checks its dependencies daily, briefs each advisory and opens the fix. Three test runs free, no card.