8.1
HighCVSS 3.1 · from microsoft
CVE-2026-85899
Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
Microsoft Edge (Chromium-based) · Use after free · CWE-416AffectedMicrosoft Edge (Chromium-based)
FixUpdate to 155.0.4283.45 or newer
PublishedOct 29, 15:21 · microsoft
ScoredOct 29 · 8.1 · microsoft
Exploit code publicNone known · checked 21:18 UTC
ExploitedNone known · CISA KEV checked 22:05 UTC
What we know
No known exploitation. CISA KEV, checked 22:05 UTC.
No public exploit code known. Exploit-DB, Metasploit, Nuclei, checked 21:18 UTC.
An attacker needs network access and an account. CVSS: network, low privileges.
A successful attack can change data and take the service down. CVSS impact.
A successful attack gives full control of the affected system. CISA: technical impact total.
Description
Use after free in Microsoft Edge (Chromium-based) allows an authorized attacker to elevate privileges over a network.
From microsoft
Affected and fixed versions
ProductAffectedFixed inMicrosoft Edge (Chromium-based)1.0.0.0 – before 155.0.4283.45155.0.4283.45
Exploit code
Exploit-DBnone knownMetasploitnone knownNucleinone known