What it is
CVE-2013-3893 is an unauthenticated vulnerability affecting Microsoft Internet Explorer. Use-after-free vulnerability in the SetMouseCapture implementation in mshtml.dll in Microsoft Internet Explorer 6 through 11...
Vulnerability report
Exploited in the wild
Confirmed confidence
In CISA KEV
CVE-2013-3893
Internet Explorer
Microsoft / Internet Explorer
- Severity
- CVSS 8.8 · High
- Confidence
- Confirmed
- Exploit status
- Exploited in the wild
- EPSS
- 85.9%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. 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 the SetMouseCapture implementation in mshtml.dll in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code via crafted JavaScript strings, as demonstrated by use of an ms-help: URL that triggers loading of hxds.dll.
- Published
- 18 Sep 2013
- Exploitation Reported
- 01 Jun 2026
- Attack vector
- Remote
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
Tags
cisa
microsoft
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2013-3893
- MS13-080 docs.microsoft.com · Vendor Advisory https://docs.microsoft.com/en-us/security-updates/securitybulletins/2...
- JVNDB-2013-000093 jvndb.jvn.jp · Third-Party Advisory http://jvndb.jvn.jp/ja/contents/2013/JVNDB-2013-000093.html
- JVN#27443259 jvn.jp · Third-Party Advisory http://jvn.jp/en/jp/JVN27443259/index.html
- TA13-288A us-cert.gov · Third-Party Advisory http://www.us-cert.gov/ncas/alerts/TA13-288A
- 62453 securityfocus.com · VDB Entry http://www.securityfocus.com/bid/62453
- oval:org.mitre.oval:def:18665 oval.cisecurity.org · VDB Entry https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.m...
- blogs.technet.com/b/srd/archive/2013/10/08/ms13-080-addresses-... blogs.technet.com · CVE Record http://blogs.technet.com/b/srd/archive/2013/10/08/ms13-080-addresses-...
- technet.microsoft.com/security/advisory/2887505 technet.microsoft.com · CVE Record http://technet.microsoft.com/security/advisory/2887505
- pastebin.com/raw.php pastebin.com · CVE Record http://pastebin.com/raw.php?i=Hx1L5gu6
- blogs.technet.com/b/srd/archive/2013/09/17/cve-2013-3893-fix-i... blogs.technet.com · CVE Record http://blogs.technet.com/b/srd/archive/2013/09/17/cve-2013-3893-fix-i...
- packetstormsecurity.com/files/162585/Microsoft-Internet-Explorer-8-S... packetstormsecurity.com · CVE Record http://packetstormsecurity.com/files/162585/Microsoft-Internet-Explor...
Exploitation evidence
Why KEV Intelligence marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
CVE
Independent exploitation attestation added to the KEV Intelligence record.
Proof of concept available
Public scanner or PoC coverage increases practical exploitability.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CVE First | 2026-06-01 10:38 UTC |
| CISA | 2026-06-02 14:06 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 0
- User-Agents
- 0
Raw values available in Pro and Enterprise.
Scanner coverage
Metasploit template detected 28 Apr 2025.
View Metasploit template (opens in new tab)Virtual patch status
No KEV Intelligence 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/ie_setmousecapture_uaf.rb | 28 Apr 2025 |
Risk and context
Severity, weaknesses, and research context
CVSS v3.1
8.8
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
85.9%
Weaknesses
All CVSS Scores
CVSS v3.1
8.8
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.
Timeline
From disclosure to observed exploitation
-
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
Added to KEV Intelligence KEV Feed
High-confidence, third-party attested exploitation
-
Metasploit module available
Exploit module available
-
Public PoC available
Public proof-of-concept code published
-
CVE published
Vulnerability disclosed publicly
-
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.
- 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-2013-3893
Free JSON includes basic KEV fields{
"cve_id": "CVE-2013-3893",
"confidence": "Confirmed",
"cvss_score": 8.8,
"cvss_estimated": false,
"epss_score": 0.8593,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}Early warning alerts
Get alerts on high-impact exploitation
Receive curator-selected alerts when exploitation activity warrants attention. Each alert includes the evidence and context needed to decide what requires attention now.