CVE-2026-85899 Microsoft Edge - Privilege Escalation

Microsoft Edge (Chromium-based) contains a use after free vulnerability that allows authorized attackers to elevate privileges over a network, exploit requires attacker authorization.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.64% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Privilege Escalation
Impact
Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Published
29 October 2026
Updated
31 October 2026
Weakness
CWE-416

Vendor fix

Update to the latest version of Microsoft Edge.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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