Microsoft Internet Explorer Use-After-Free Vulnerability

Technical Severity

CVSS v3.1 Metrics

HIGH

8.8 / 10

Minimal Risk Critical

Vector Specification

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitation Likelihood

EPSS Prediction

87.25 %

Predictive Probability

Percentile Rank

99.5 th

Documented as more likely to be exploited than 99.5% of known CVEs.

Detection Date

May 20, 2026

Remediation Due

Jun 03, 2026

CISA Catalog Active

Threat Analysis

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.

Remediation Directive

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

External Intelligence

https://learn.microsoft.com/en-us/security-updates/securityadvisories/2010/981374

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2010-0806