Known Exploited Vulnerability

CVE-2010-3962

Microsoft Internet Explorer Uninitialized Memory Corruption Vulnerability

Past federal due date 2 public exploits Added 06 Oct 2025 Due 27 Oct 2025 · 279 days ago
VendorMicrosoft
ProductInternet Explorer
WeaknessNot mapped
RansomwareNone confirmed

What the flaw is

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.

Description as published by CISA. We have not independently reproduced it.

What CISA requires

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

This deadline is binding on US federal civilian agencies under BOD 22-01. It is not a legal deadline for anyone else, but it is a useful urgency signal — CISA sets it by how actively the flaw is being used, not by CVSS.

Public exploit code

2 public repositories referencing this CVE have been catalogued on GitHub. Treat this as a strong signal to prioritise patching, not as a verified working exploit — many such repositories are scanners, write-ups or forks rather than functional code.

Vendor advisories

Primary sources

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Source: CISA KEV catalog · last verified July 31, 2026. Rebuilt automatically twice a day.