CVE-2010-0806
Microsoft Internet Explorer Use-After-Free Vulnerability
Microsoft Internet Explorer
Use-after-free vulnerability in the Peer Objects component (aka iepeers.dll) in Microsoft Internet Explorer 6, 6 SP1, and 7 allows remote attackers to execute arbitrary code via vectors involving access to an invalid pointer after the deletion of an object, as exploited in the wild in March 2010, aka "Uninitialized Memory Corruption Vulnerability."
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 20 May 2026. US federal agencies were required to remediate it by 3 June 2026.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 82.1%, which is higher than 99.7% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2010-0806 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2010-0806.
What does CVE-2010-0806 affect?
CVE-2010-0806 affects Microsoft Internet Explorer. Use-after-free vulnerability in the Peer Objects component (aka iepeers.dll) in Microsoft Internet Explorer 6, 6 SP1, and 7 allows remote attackers to execute arbitrary code via vectors involving access to an invalid pointer after the deletion of an object, as exploited in the wild in March 2010, aka "Uninitialized Memory Corruption Vulnerability."
How severe is CVE-2010-0806?
CVE-2010-0806 is rated HIGH with a CVSS base score of 8.8. EPSS puts the probability of exploitation in the next 30 days at 82.1%, higher than 99.7% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 3 June 2026.
How should organisations respond to CVE-2010-0806?
Apply the vendor patch for Microsoft Internet Explorer as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.