CVE-2026-20942

MEDIUM
Published Oct 29, 2026 Modified Oct 30, 2026 CWE-1021

Description

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

Is your site exposed to CVE-2026-20942?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

4.3
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

EPSS — Exploit Prediction

0.0064
Probability of exploitation
0.51%
Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-1021 CWE-1021

References

Frequently Asked Questions

What is CVE-2026-20942? +
Improper restriction of rendered ui layers or frames in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network. It has a CVSS v3.1 base score of 4.3 (MEDIUM).
How severe is CVE-2026-20942? +
CVE-2026-20942 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0064, placing it in the 1th percentile for exploitation probability.
How do I check if I'm vulnerable to CVE-2026-20942? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2025-6983

A Clickjacking vulnerability in TP-Link Archer C1200 web management page allows an attacker to trick users into performing unintended actions …
CVE-2026-114125

Storybook is a frontend workshop for building user interface components and pages in isolation. From 8.0.0 until 8.6.19, 9.1.21, 10.6.2, …
CVE-2025-41000

Cross-Frame Scripting (XFS) vulnerability in BoomCMS v9.1.4 from UXB London. XFS is a web attack technique that exploits specific browser …
CVE-2025-64387

The web application is vulnerable to a so-called ‘clickjacking’ attack. In this type of attack, the vulnerable page is inserted …
CVE-2026-47723

nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network. Prior to version 0.3.1, none of the …
CVE-2026-77062

The boneIO Black web interface lacks proper clickjacking protections. A remote attacker can embed the control panel in an iframe …

Don't wait for an exploit

Scan your website for vulnerabilities like CVE-2026-20942 — free, no signup required.