CVE-2026-66315
Received Received - Intake

Use After Free in Microsoft Edge Chromium

Publication date: 2026-08-04

Last updated on: 2026-08-04

Assigner: Microsoft Corporation

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

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-08-04
Last Modified
2026-08-04
Generated
2026-08-04
AI Q&A
2026-08-04
EPSS Evaluated
N/A
NVD
CVE-2026-66315
EUVD
EUVD-2026-52527

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
microsoft edge *

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is a use after free issue in Microsoft Edge (Chromium-based). It allows an unauthorized attacker to execute arbitrary code remotely over a network by exploiting a memory corruption flaw.

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. It requires user interaction like clicking a link or opening a file.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR (data protection) and HIPAA (health data privacy) requirements. Organizations may face fines or legal consequences if exploited.

Mitigation Strategies

Update Microsoft Edge to the latest version immediately to patch the use-after-free vulnerability in the Chromium-based browser.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-66315. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart