Improper restriction of rendered ui layers or frames in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
Severity
Low
CVSS base score
4.3
Impact
Spoofing
Exploitation detected
No known exploitation (MSRC assessment)
Exploitability
Exploitation Less Likely
Publicly disclosed
No (MSRC assessment)
EPSS · 30-day forecast
0.6%FIRST forecast dated 12 Nov 2026, for the following 30 days · FIRST percentile 50.6% · about EPSS
Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
Detection template: No Nuclei template listed · Customer action: Required: apply the update → Required: follow the MSRC remediation guidance · Public disclosure: No → No (MSRC assessment) · Exploitation detected: Not reported by MSRC → No known exploitation (MSRC assessment)
Page history
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CISA KEV lists vulnerabilities known to be exploited. FIRST EPSS estimates the likelihood of exploitation in the next 30 days. An unavailable score does not mean zero risk.
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cve-program · CVE-2026-20942
Published
Microsoft Edge (Chromium-based) Spoofing Vulnerability
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 Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.