CVE-2010-0249 — Use-after-free vulnerability in Microsoft Internet Explorer 6, 6 SP1, 7, and 8 o

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

01What is this vulnerability?

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…

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2026-05-20. Ransomware use: Unknown.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2010-01-15T17:30:00.533
• Last modified: 2026-05-20T18:16:25.573
• Added to CISA KEV: 2026-05-20

09References

• blogs.technet.com — http://blogs.technet.com/msrc/archive/2010/01/14/security-advisory-979352.aspx
• news.cnet.com — http://news.cnet.com/8301-27080_3-10435232-245.html
• osvdb.org — http://osvdb.org/61697
• securitytracker.com — http://securitytracker.com/id?1023462
• support.microsoft.com — http://support.microsoft.com/kb/979352
• www.exploit-db.com — http://www.exploit-db.com/exploits/11167
• www.kb.cert.org — http://www.kb.cert.org/vuls/id/492515
• www.microsoft.com — http://www.microsoft.com/technet/security/advisory/979352.mspx
• www.securityfocus.com — http://www.securityfocus.com/bid/37815
• www.us-cert.gov — http://www.us-cert.gov/cas/techalerts/TA10-055A.html