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CVE-2021-31937: Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability

• Severity: high (CVSS 8.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-06-28 · updated 2026-06-17
• Weakness: CWE-269

Description

Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability

Affected products

• Microsoft Edge (Chromium): before 91.0.864.37 — fixed in 91.0.864.37
• Microsoft Edge (Chromium): from 1.0.0 before 91.0.864.37 — fixed in 91.0.864.37

How to fix

Upgrade to a fixed version: Microsoft Edge (Chromium) 91.0.864.37; Microsoft Edge (Chromium) 91.0.864.37. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31937
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31937

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