CVE entry · CVE-2010-0806
CVE-2010-0806: Microsoft Internet Explorer Use-After-Free Vulnerability
Microsoft Internet Explorer contains an use-after-free vulnerability that could allow remote attackers to execute arbitrary code via vectors involving access to an invalid pointer after the deletion of an object. The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.
- Actively exploited: added to CISA’s KEV catalog on May 20, 2026.
- Use by ransomware: not established so far.
- Remediation deadline for US federal agencies: June 3, 2026.
Description from CISA’s KEV catalog.
What to do
- Check whether your estate includes Microsoft Internet Explorer, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.
References
- Vendor advisory or reference cited by CISA (learn.microsoft.com)
- NVD entry (NIST)
- CISA KEV catalog
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Microsoft Windows Command Injection Vulnerability
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Microsoft SharePoint Code Injection Vulnerability
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Microsoft Windows Heap-Based Buffer Overflow Vulnerability
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Microsoft Windows Link Following Vulnerability
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Microsoft SQL Server Remote Code Execution Vulnerability
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Microsoft SharePoint Weak Authentication Vulnerability