Medium severity · published Oct 29, 2026
CVE-2026-88090
Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
New
5.4
CVSS
–
EPSS
No
On KEV
Description
Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to elevate privileges over a network.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
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 154.0.4258.37 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-88090
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-88090
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88090
More from Microsoft Edge (Chromium-based)
8.8
CVE-2026-96951
Windows Shell Security Feature Bypass Vulnerability
10.0
CVE-2026-57983
Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability
9.8
CVE-2026-45495
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
9.8
CVE-2024-43566
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
9.6
CVE-2026-66321
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability