CVE-2026-69486

Analyzed Analyzed - Analysis Complete

Heap-based Buffer Overflow in Microsoft Edge

Publication date: 2026-09-15

Last updated on: 2026-09-25

Assigner: Microsoft Corporation

Description

Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-15

Last Modified

2026-09-25

Generated

2026-10-06

AI Q&A

2026-09-16

EPSS Evaluated

2026-10-04

NVD

CVE-2026-69486

EUVD

EUVD-2026-80050

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-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

Executive Summary

This is a heap-based buffer overflow in Microsoft Edge (Chromium-based). It allows an attacker to execute arbitrary code remotely without authentication by exploiting a flaw in memory handling.

Impact Analysis

An attacker could exploit this to run malicious code on your system, potentially stealing data, installing malware, or taking control of your device through a network connection.

Mitigation Strategies

Update Microsoft Edge to the latest version immediately to patch the heap-based buffer overflow vulnerability. Disable unnecessary network-facing services if not in use and monitor for unusual network traffic or system behavior.

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