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 2
Affects Internet Explorer 5.01, 6, 6 SP1, 7 and 8 on supported Windows editions; Server Core installations of Windows Server 2008 and 2008 R2 are not affected. No fixed version is listed in the checked facts.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Microsoft Internet Explorer web browser on several Windows operating systems is affected. A remote attacker could exploit a memory handling flaw to run arbitrary code on an affected computer.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
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."
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- Record last updated
- CISA remediation deadline
Due date for US federal agencies to patch
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- n/a n/a
Version range not reported
References 14
microsoft.com
oval.cisecurity.org
osvdb.org
securityfocus.com
kb.cert.org
Exploit-DB
support.microsoft.com
blogs.technet.com
exchange.xforce.ibmcloud.com
us-cert.gov
docs.microsoft.com
news.cnet.com
securitytracker.com
vupen.com
Questions about CVE-2010-0249
What does this mean?
The bug is a use-after-free flaw in Internet Explorer. If a user views a specially crafted Web page, it could allow remote code execution.Source: learn.microsoft.com
Am I affected, and how do I check?
The listed versions are Internet Explorer 5.01, 6, 6 SP1, 7 and 8 on supported Windows editions. Server Core installations of Windows Server 2008 and 2008 R2 are not affected. A reader can check the installed Internet Explorer version under Help, then About Internet Explorer.Source: learn.microsoft.com
What should I do about it?
The checked facts do not name a fixed version or upgrade target. Check Microsoft's advisory for the current update for the affected Internet Explorer version.Source: learn.microsoft.com
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2026-05-20, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data
What if there's no patch?
The checked facts do not describe a workaround. Consult Microsoft's advisory for any mitigation guidance while no fix is confirmed.Source: learn.microsoft.com