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Multiple Vulnerabilities in Microsoft Edge (Chromium-based) 

Indian – Computer Emergency Response Team (https://www.cert-in.org.in)

Severity Rating: HIGH

Software Affected

Microsoft Edge (Chromium based) version prior to 140.0.3485.54

Overview

Multiple vulnerabilities have been reported in Microsoft Edge (Chromium based), which could allow an attacker to bypass security restrictions and execute arbitrary code on the targeted system.

Target Audience:

All end-user organizations and individuals using Microsoft Edge (Chromium based).

Risk Assessment:

High risk of unauthorized access to data and system compromise.

Impact Assessment:

Bypass security restrictions and remote code execution.

Description

Microsoft Edge (Chromium-based) is a web browser developed by Microsoft using the Chromium engine, offering fast performance, enhanced security, and compatibility with modern web standards while integrating with Microsoft services.

Multiple vulnerabilities exist in Microsoft Edge (Chromium based) due to use-after-free in V8, improper implementation in Toolbar, Extensions, and Downloads and bypass the Security feature on the targeted system.

Successful exploitation of these vulnerabilities could allow an attacker bypass security restrictions and execute arbitrary code on the targeted system.

Solution

Apply appropriate updates as mentioned in:

https://learn.microsoft.com/en-us/deployedge/microsoft-edge-relnotes-security#september-5-2025

References

Microsoft

https://learn.microsoft.com/en-us/deployedge/microsoft-edge-relnotes-security#september-5-2025

CVE Name

CVE-2025-53791

CVE-2025-9864

CVE-2025-9865

CVE-2025-9866

CVE-2025-9867

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Thanks and Regards,

CERT-In

Incident Response Help Desk

e-mail: incident@cert-in.org.in

Phone: +91-11-22902657

Toll Free Number: 1800-11-4949

Toll Free Fax : 1800-11-6969

Web: http://www.cert-in.org.in

PGP Fingerprint: A768 083E 4475 5725 B81A A379 2156 C0C0 B620 D0B4

PGP Key information:

https://www.cert-in.org.in/s2cMainServlet?pageid=CONTACTUS

Postal address:

Indian Computer Emergency Response Team (CERT-In)

Ministry of Electronics and Information Technology

Government of India

Electronics Niketan

6, C.G.O. Complex

New Delhi-110 003

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