← Vulnerability Intelligence

CVE-2013-2551

High 8.8 Exploited in the wild (KEV) Used in ransomware campaigns

Confirmed active exploitation — CISA KEV catalog

Name
Microsoft Internet Explorer Use-After-Free Vulnerability
Added to catalog
Remediation due date (US federal)
Required action
Apply updates per vendor instructions.

Description

Use-after-free vulnerability in Microsoft Internet Explorer 6 through 10 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to a deleted object, as demonstrated by VUPEN during a Pwn2Own competition at CanSecWest 2013, aka "Internet Explorer Use After Free Vulnerability," a different vulnerability than CVE-2013-1308 and CVE-2013-1309.

Metrics

CVSS 3.1
8.8 (HIGH) Score source: NVD CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS — exploit probability
74% (percentile: 99) as of 1 November 2026
CWE
CWE-416

Affected products

microsoft: internet explorer; microsoft: windows server 2003; microsoft: windows xp; microsoft: windows server 2008; microsoft: windows vista; microsoft: windows 7; microsoft: windows 8; microsoft: windows rt; microsoft: windows server 2012

References