What is CVE-2026-50521?

CVE-2026-50521 is a high-severity vulnerability in Microsoft Edge Chromium, classified under Use After Free. CVSS score: 8.3/10. Published 2026-07-01.

How severe is CVE-2026-50521?

High severity. CVSS v3 base score is 8.3 out of 10.

Use After Free in Microsoft Edge Chromium

CVE-2026-50521

Use after free in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.

Vulnerability class: Use-After-Free

EPSS: 0.005 (37.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L.

Affected products

Microsoft Edge_chromium
Microsoft Edge (Chromium-based) — versions 1.0.0.0

Weakness classification (CWE)

CWE-416 — Use After Free

References

Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-50521?: CVE-2026-50521 is a high-severity vulnerability in Microsoft Edge Chromium, classified under Use After Free. CVSS score: 8.3/10. Published 2026-07-01.
How severe is CVE-2026-50521?: High severity. CVSS v3 base score is 8.3 out of 10.