CVE-2010-3962
Published: October 6, 2025
Official Description
Microsoft Internet Explorer contains an uninitialized memory corruption vulnerability that could allow for remote code execution. The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.
CISA KEV Advisory
Microsoft Internet Explorer Uninitialized Memory Corruption Vulnerability
Microsoft Internet Explorer contains an uninitialized memory corruption vulnerability that could allow for remote code execution. The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Risk Analysis
Microsoft Internet Explorer contains an uninitialized memory corruption vulnerability that could allow for remote code execution. The very high EPSS score of 0.87030 indicates a strong likelihood of exploitation, and its inclusion in CISA's KEV confirms active exploitation, making this a critical vulnerability. Users should discontinue use of this end-of-life product.
This vulnerability is actively being exploited in the wild. The memory corruption flaw allows for remote code execution, making it remotely exploitable.
Users should immediately discontinue the use of Microsoft Internet Explorer as it is an end-of-life product. Migrate to a supported and secure web browser.
Technical Analysis
CVE-2010-3962 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2010-3962 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2010-3962 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1