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CVE-2026-85893: Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-15 · updated 2026-10-31
• Weakness: CWE-416

Description

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

Affected products

• Microsoft Edge (Chromium): before 153.0.4234.32 — fixed in 153.0.4234.32
• Microsoft Edge (Chromium): from 1.0.0.0 before 153.0.4234.32 — fixed in 153.0.4234.32

How to fix

Upgrade to a fixed version: Microsoft Edge (Chromium) 153.0.4234.32; Microsoft Edge (Chromium) 153.0.4234.32. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85893

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