CVE-2013-3893Use-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 s…
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It affects microsoft internet_explorer. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Aug 12, 2025; federal agencies had to remediate by Sep 2, 2025. Treat that date as your deadline.
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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.
- CVSS
- 8.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-416
- Known exploited
- Added to CISA KEV Aug 12, 2025; federal remediation due Sep 2, 2025Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 87.53% (percentile 100)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 22, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
microsoft internet_explorer microsoft:internet_explorer | 6; 7; 8; 9; 10; 11; 11 | NVD |
References
- http://jvndb.jvn.jp/ja/contents/2013/JVNDB-2013-000093.htmlthird-party-advisory, x-refsource-jvndb
- http://jvn.jp/en/jp/JVN27443259/index.htmlthird-party-advisory, x-refsource-jvn
- http://blogs.technet.com/b/srd/archive/2013/10/08/ms13-080-addresses-two-vulnerabilities-under-limited-targeted-attacks.aspxx-refsource-confirm, vendor-advisory
- http://www.securityfocus.com/bid/62453vdb-entry, x-refsource-bid, broken-link
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18665vdb-entry, signature, x-refsource-oval, broken-link
- http://www.us-cert.gov/ncas/alerts/TA13-288Athird-party-advisory, x-refsource-cert, us-government-resource
- http://technet.microsoft.com/security/advisory/2887505x-refsource-confirm, vendor-advisory
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-080vendor-advisory, x-refsource-ms
- http://pastebin.com/raw.php?i=Hx1L5gu6x-refsource-misc, exploit
- http://blogs.technet.com/b/srd/archive/2013/09/17/cve-2013-3893-fix-it-workaround-available.aspxx-refsource-confirm, exploit
- http://packetstormsecurity.com/files/162585/Microsoft-Internet-Explorer-8-SetMouseCapture-Use-After-Free.htmlx-refsource-misc, exploit
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2013-3893us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.