CVE-2026-85893

Analyzed Analyzed - Analysis Complete

Use After Free in Microsoft Edge Chromium

Publication date: 2026-09-15

Last updated on: 2026-09-25

Assigner: Microsoft Corporation

Description

Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to elevate privileges over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-15

Last Modified

2026-09-25

Generated

2026-10-07

AI Q&A

2026-09-16

EPSS Evaluated

2026-10-05

NVD

CVE-2026-85893

EUVD

EUVD-2026-80051

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	edge_chromium	to 153.0.4234.32 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This is a use-after-free vulnerability in Microsoft Edge (Chromium-based). It allows an unauthorized attacker to elevate privileges over a network by exploiting a flaw where memory is accessed after it has been freed, potentially leading to arbitrary code execution or system compromise.

Impact Analysis

An attacker could exploit this to gain elevated privileges on your system, potentially allowing them to install programs, view, change, or delete data, or create new accounts with full user rights. This could lead to significant security breaches or data theft.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, which may violate compliance requirements under GDPR (data protection) or HIPAA (health information privacy). Organizations could face fines or legal penalties if such breaches occur due to unpatched systems.

Mitigation Strategies

Update Microsoft Edge to the latest version immediately to patch the use-after-free vulnerability. Disable unnecessary network-facing services if not required. Monitor network traffic for unusual privilege escalation attempts.

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