CVE-2013-3893

HighActively exploited (CISA KEV)

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.

SeverityHigh

CVSS8.8

Exploit probability—

Product

Microsoft Internet Explorer

PublishedSep 18, 2013

First seenSep 18, 2013

Added to KEVAug 12, 2025

Weakness typeCWE-416Use after free

How to fix

CISA 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.

CISA due date: Sep 2, 2025

Vendor advisories

docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-080

Affected products

Product	Affected versions	Fixed in
microsoft internet_explorer	6, 7, 8, 9, 10, 11	—

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