Microsoft Internet Explorer Use-After-Free
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA deadline 2026-06-03 · passed 3 months ago · applies to US federal civilian agencies; used elsewhere as a reference SLA
What happened
Microsoft Internet Explorer contains an use-after-free vulnerability that could allow remote attackers to execute arbitrary code by accessing a pointer associated with a deleted object. The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.
Who is affected
Microsoft Internet Explorer. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.
Weakness class: CWE-416.
Timeline
- Added to CISA KEVExploitation in the wild confirmed by CISA
- CISA remediation deadlinepassed 3 months ago
Sources
- NVD entry for CVE-2010-0249 nvd.nist.gov/vuln/detail/CVE-2010-0249
- CISA Known Exploited Vulnerabilities catalog www.cisa.gov/known-exploited-vulnerabilities-catalog
- learn.microsoft.com learn.microsoft.com/en-us/security-updates/SecurityAdvisories/2010/979352
- nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2010-0249