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CVE-2026-20942— Microsoft Edge (Chromium-based) Spoofing Vulnerability

Quick assessment

Affected

Microsoft Microsoft Edge (Chromium-based)

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Edge（基于 Chromium）中对渲染的 UI 层或帧的限制不当，允许未经授权的攻击者通过网络进行欺骗攻击。

CVSS 4.3 · Medium Updated Oct 29, 2026

Possible ATT&CK Techniques 2 AI

T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

Vendor	Product	Version Range	Status
Microsoft	Microsoft Edge (Chromium-based)	`1.0.0.0< 156.0.4314.42`	affected

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Vulnerability Information

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Vulnerability Title

Microsoft Edge (Chromium-based) Spoofing Vulnerability

Source: CVE Program / CVE List V5

Vulnerability Description

Improper restriction of rendered ui layers or frames in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

不当限制渲染UI层或帧

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Microsoft	Microsoft Edge (Chromium-based)	1.0.0.0 ~ 156.0.4314.42	-

II. Public POCs for CVE-2026-20942

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-20942

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Other References for CVE-2026-20942 (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20942 vendor-advisory patch

https://www.cve.org/CVERecord?id=CVE-2026-20942

Same Patch Batch · Microsoft · 2026-10-29 · 15 CVEs total

CVE-2026-88077	8.8 HIGH	Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
CVE-2026-96196	8.8 HIGH	Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability
CVE-2026-96203	8.8 HIGH	Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
CVE-2026-96192	8.8 HIGH	Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-96199	8.8 HIGH	Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-96198	8.8 HIGH	Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-85890	8.8 HIGH	Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-85897	8.8 HIGH	Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-85899	8.1 HIGH	Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
CVE-2026-114148	7.8 HIGH	ASP.NET Core Elevation of Privilege Vulnerability
CVE-2026-96187	7.4 HIGH	Microsoft Edge (Chromium-based) Information Disclosure Vulnerability
CVE-2026-88090	5.4 MEDIUM	Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
CVE-2026-88078	4.3 MEDIUM	Microsoft Edge (Chromium-based) Spoofing Vulnerability
CVE-2026-85330	4.3 MEDIUM	Microsoft Edge for Android Security Feature Bypass Vulnerability

IV. Related Vulnerabilities

Same product: Microsoft Edge (Chromium-based)

Same vendor: Microsoft

Same weakness: CWE-1021