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CVE-2025-21401: Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability

• Severity: medium (CVSS 4.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-02-14 · updated 2026-06-17
• Weakness: CWE-601

Description

Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability

Affected products

• Microsoft Edge (Chromium): before 133.0.3065.69 — fixed in 133.0.3065.69
• Microsoft Edge (Chromium): from 1.0.0.0 before 133.0.3065.69 — fixed in 133.0.3065.69

How to fix

Upgrade to a fixed version: Microsoft Edge (Chromium) 133.0.3065.69; Microsoft Edge (Chromium) 133.0.3065.69. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21401

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