CVE-2026-50517

—

CVSS 3.1

9.9 critical

EPSS

1%p68

Published

Jul 24, 2026 (Jul 24, 2026)

Modified

Jul 29, 2026

Description

Deserialization of untrusted data in M365 Copilot allows an authorized attacker to execute code over a network.

Vendors: microsoft
Products: 365 copilot
Weakness: CWE-502
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (1.3%)

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