8.8
HighCVSS 3.1 · from microsoft
CVE-2026-88077
Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
Microsoft Edge (Chromium-based) · Integer overflow · CWE-190AffectedMicrosoft Edge (Chromium-based)
FixUpdate to 154.0.4258.62 or newer
PublishedOct 29, 15:21 · microsoft
ScoredOct 29 · 8.8 · 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 only needs network access to the target. No login needed. CVSS: network, no privileges.
Someone has to open, click or run something first. CVSS: user interaction required.
A successful attack can read and change data and take the service down. CVSS: high impact on confidentiality, integrity and availability.
A successful attack gives full control of the affected system. CISA: technical impact total.
Description
Integer overflow or wraparound in Microsoft Edge (Chromium-based) allows an unauthorized attacker to elevate privileges over a network.
From microsoft
Affected and fixed versions
ProductAffectedFixed inMicrosoft Edge (Chromium-based)1.0.0.0 – before 154.0.4258.62154.0.4258.62
Exploit code
Exploit-DBnone knownMetasploitnone knownNucleinone known