CVE-2013-3893

HIGH8.8

CISA KEV

Published 2013-09-18 · Updated 2026-06-16 · Source secure@microsoft.com

Summary

CVE-2013-3893 is a high-severity (CVSS 8.8) vulnerability in Microsoft Internet Explorer. CISA added it to the Known Exploited Vulnerabilities catalog on August 12, 2025, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by September 2, 2025. CISA does not currently list it as used in ransomware campaigns. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.

All 390 known-exploited Microsoft vulnerabilities →

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.

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

CWE-416CWE-416

CISA Known-Exploited Vulnerability

Product: Microsoft — Internet Explorer

Name: Microsoft Internet Explorer Resource Management Errors Vulnerability

Date added: 2025-08-12 · Due: 2025-09-02

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.

References

View on NVD

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