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CVE-2026-57980: Microsoft Edge (Chromium-based) Tampering 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: 2026-07-17 · updated 2026-10-28
• Weakness: CWE-288

Description

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

Affected products

• Microsoft Edge (Chromium): before 150.0.4078.80 — fixed in 150.0.4078.80
• Microsoft Edge (Chromium): from 1.0.0.0 before 150.0.4078.80 — fixed in 150.0.4078.80

How to fix

Upgrade to a fixed version: Microsoft Edge (Chromium) 150.0.4078.80; Microsoft Edge (Chromium) 150.0.4078.80. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57980

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