CVE-2026-50517EPSS p76.3%

CVE-2026-50517CVE-2026-50517

microsoft / 365_copilot

Description

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

Scoring

CVSS 9.9 ()
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS1.69% probability of exploitation · percentile 76.3% · 2026-10-05T12:00:23Z
Last modified2026-07-29
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.