Medium severity · published Oct 29, 2026
CVE-2026-20942
Microsoft Edge (Chromium-based) Spoofing Vulnerability
New
4.3
CVSS
–
EPSS
No
On KEV
Description
Improper restriction of rendered ui layers or frames in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ME
Microsoft Edge (Chromium-based) · Microsoft
1.0.0.0 before 156.0.4314.42 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20942
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-20942
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20942
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