What’s Vulnerable › Vulnerabilities
CVE-2026-66323: Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-28 · updated 2026-10-30
- Weakness: CWE-141
Description
Improper neutralization of parameter/argument delimiters in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
Affected products
- Microsoft Edge (Chromium): before 152.0.4191.53 — fixed in 152.0.4191.53
- Microsoft Edge: from 1.0.0.0 before 152.0.4191.52 — fixed in 152.0.4191.52
- Microsoft Edge (Chromium): from 1.0.0.0 before 152.0.4191.53 — fixed in 152.0.4191.53
- Microsoft Edge for Linux: from 1.0.0 before 152.0.4191.52 — fixed in 152.0.4191.52
- Microsoft Edge for MAC: from 1.0.0.0 before 152.0.4191.52 — fixed in 152.0.4191.52
- Microsoft Edge for Windows: from 1.0.0.0 before 152.0.4191.52 — fixed in 152.0.4191.52
How to fix
Upgrade to a fixed version: Microsoft Edge (Chromium) 152.0.4191.53; Microsoft Edge 152.0.4191.52; Microsoft Edge (Chromium) 152.0.4191.53; Microsoft Edge for Linux 152.0.4191.52; Microsoft Edge for MAC 152.0.4191.52; Microsoft Edge for Windows 152.0.4191.52. Check the vendor advisory for mitigations.
References
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