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CVE-2026-72970: Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

• Severity: high (CVSS 8.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-14 · updated 2026-10-26
• Weakness: CWE-122

Description

Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Affected products

• Microsoft Edge (Chromium): before 151.0.4129.86 — fixed in 151.0.4129.86
• Microsoft Edge (Chromium): from 1.0.0.0 before 151.0.4129.86 — fixed in 151.0.4129.86

How to fix

Upgrade to a fixed version: Microsoft Edge (Chromium) 151.0.4129.86; Microsoft Edge (Chromium) 151.0.4129.86. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72970

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