Vulnerability report

Trusted Third Party Report Confirmed Confidence In CISA KEV

CVE-2010-3962

Internet Explorer

Microsoft / Internet Explorer

Watch CVE-2010-3962 Browse KEV feed
Severity
CVSS 8.1 · High
Confidence
Confirmed
Exploit status
Trusted Third Party Report
EPSS
96.8%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2010-3962 is an unauthenticated vulnerability affecting Microsoft Internet Explorer.

Have exploitation attempts been observed?

Yes. Exploitation attempts have been reported for this vulnerability. Previdian lists it as a known exploited vulnerability. Listed in CISA KEV. Also reported by third-party sources. Confidence is confirmed.

Who is affected?

Microsoft / Internet Explorer.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Internet Explorer

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.

View vendor advisory (opens in new tab)
Published
05 Nov 2010
Exploitation Attempts Reported
05 Nov 2010
Attack vector
Remote
Complexity
High
Privileges
None
User interaction
None

Tags

cisa metasploit microsoft metasploit_scanner

CVE References

  • CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2010-3962
  • MS10-090 docs.microsoft.com · Vendor Advisory https://docs.microsoft.com/en-us/security-updates/securitybulletins/2...
  • TA10-348A us-cert.gov · Third-Party Advisory http://www.us-cert.gov/cas/techalerts/TA10-348A.html
  • VU#899748 kb.cert.org · Third-Party Advisory http://www.kb.cert.org/vuls/id/899748
  • 42091 secunia.com · Third-Party Advisory http://secunia.com/advisories/42091
  • 15421 exploit-db.com · Exploit http://www.exploit-db.com/exploits/15421
  • 15418 exploit-db.com · Exploit http://www.exploit-db.com/exploits/15418
  • 44536 securityfocus.com · VDB Entry http://www.securityfocus.com/bid/44536
  • ADV-2010-2880 vupen.com · VDB Entry http://www.vupen.com/english/advisories/2010/2880
  • 1024676 securitytracker.com · VDB Entry http://www.securitytracker.com/id?1024676
  • ms-ie-flag-code-execution(62962) exchange.xforce.ibmcloud.com · VDB Entry https://exchange.xforce.ibmcloud.com/vulnerabilities/62962
  • oval:org.mitre.oval:def:12279 oval.cisecurity.org · VDB Entry https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.m...
  • microsoft.com/technet/security/advisory/2458511.mspx microsoft.com · CVE Record http://www.microsoft.com/technet/security/advisory/2458511.mspx
  • symantec.com/connect/blogs/new-ie-0-day-used-targeted-att... symantec.com · CVE Record http://www.symantec.com/connect/blogs/new-ie-0-day-used-targeted-attacks
  • blogs.technet.com/b/msrc/archive/2010/11/02/microsoft-releases... blogs.technet.com · CVE Record http://blogs.technet.com/b/msrc/archive/2010/11/02/microsoft-releases...

Exploitation evidence

Evidence of exploitation attempts

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploitation Attempts Observed in the Wild

CVE

Recorded 05 Nov 2010

A trusted third party reported exploitation attempts.

Proof of concept available

Recorded 28 Apr 2025

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
CVE First 2010-11-05 16:28 UTC
CISA 2026-06-02 14:05 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Metasploit https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/browser/ms10_090_ie_css_clip.rb 28 Apr 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

8.1 High

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

96.8%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Use After Free CWE-416

All CVSS Scores

CVSS v3.1 8.1 High

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

CVSS v2.0 9.3 High

AV:N/AC:M/Au:N/C:C/I:C/A:C

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

ms10_090_ie_css_clip

metasploit · Created Unknown

Metasploit module for CVE-2010-3962

Timeline

From disclosure to observed exploitation attempts

  1. 14:05 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  2. 15:02 UTC

    Metasploit module available

    Exploit module available

  3. 15:02 UTC

    Public PoC available

    Public proof-of-concept code published

  4. 16:28 UTC

    Added to Previdian KEV Feed

    High-confidence, third-party report of exploitation attempts

  5. 16:28 UTC

    CVE published

    Vulnerability disclosed publicly

  6. 00:00 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

Start 14-day Pro trial Read API docs
  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2010-3962

Sample API response 
{
  "cve_id": "CVE-2010-3962",
  "confidence": "Confirmed",
  "cvss_score": 8.1,
  "cvss_estimated": false,
  "epss_score": 0.96831,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}