CVE-2013-3893

microsoft internet explorer

Published 18 Sept 2013 · updated 16 Jun 2026 · Analyzed

8.8 High · CVSS 3.1, CISA ADP

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 12 Aug 2025, with a remediation deadline of 2 Sept 2025 for US federal agencies.

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.

Description

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.

References

blogs.technet.com/b/srd/archive/2013/09/17/cve-2013-3893-fix-it-workaround-available.aspx · Exploit
blogs.technet.com/b/srd/archive/2013/10/08/ms13-080-addresses-two-vulnerabilities-under-limited-targeted-attacks.aspx · Vendor Advisory
jvn.jp/en/jp/JVN27443259/index.html · Third Party Advisory
jvndb.jvn.jp/ja/contents/2013/JVNDB-2013-000093.html · Third Party Advisory
packetstormsecurity.com/files/162585/Microsoft-Internet-Explorer-8-SetMouseCapture-Use-After-Free.html · Exploit
pastebin.com/raw.php?i=Hx1L5gu6 · Exploit
technet.microsoft.com/security/advisory/2887505 · Vendor Advisory
www.securityfocus.com/bid/62453 · Broken Link
www.us-cert.gov/ncas/alerts/TA13-288A · US Government Resource
docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-080 · Vendor Advisory
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18665 · Broken Link
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2013-3893 · US Government Resource