CVE-2010-0249KEV · OVERDUE

Microsoft Internet Explorer Use-After-Free Vulnerability

High · published January 15, 2010

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Confirmed exploited, and the score agrees

CVSS calls it high at 8.8. It is confirmed in active exploitation. It sits in the 99.8th percentile for exploit probability.

142
days past CISA
deadline
CVSS v3.1
8.8
EPSS
92%
Percentile
99.8
In the wild
Confirmed
What it is

Use-after-free vulnerability in Microsoft Internet Explorer 6, 6 SP1, 7, and 8 on Windows 2000 SP4; Windows XP SP2 and SP3; Windows Server 2003 SP2; Windows Vista Gold, SP1, and SP2; Windows Server 2008 Gold, SP2, and R2; and Windows 7 allows remote attackers to execute arbitrary code by accessing a pointer associated with a deleted object, related to incorrectly initialized memory and improper handling of objects in memory, as exploited in the wild in December 2009 and January 2010 during Operation Aurora, aka "HTML Object Memory Corruption Vulnerability."

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.91939 · 99.8th percentile
Published
2010-01-15T17:00Z
KEV added
2026-05-20 · due 2026-06-03
EPSS history
Timeline
  • 20 MAY 00:00Z
    Added to CISA KEV — remediate by Jun 3
    kev
  • 15 JAN 17:00Z
    Use-after-free vulnerability in Microsoft Internet Explorer 6, 6 SP1, 7, and 8 on Windows 2000 SP4; Windows XP SP2 and SP3; Windows Server 2003 SP2; Windows…
    cvelistv5