What is CVE-2026-57980?

CVE-2026-57980 is a medium-severity vulnerability in Microsoft Edge (Chromium-based), classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 5.4/10. Published 2026-07-17.

How severe is CVE-2026-57980?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Microsoft Edge (Chromium-based)

CVE-2026-57980

Authentication bypass using an alternate path or channel in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform tampering over a network.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Microsoft Edge (Chromium-based) — versions 1.0.0.0

Weakness classification (CWE)

CWE-288 — Authentication Bypass Using an Alternate Path or Channel

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-57980?: CVE-2026-57980 is a medium-severity vulnerability in Microsoft Edge (Chromium-based), classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 5.4/10. Published 2026-07-17.
How severe is CVE-2026-57980?: Medium severity. CVSS v3 base score is 5.4 out of 10.