Dashboard / CVE-2026-50517

CVE-2026-50517

CRITICAL
INFO Priority: 0.17 BB Relevance: 70/100
Published: 2026-07-24 Modified: 2026-10-28 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Interaction Conf. Impact Integ. Impact Scope Change

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: Changed
C: High
I: High
A: High

Description

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

Weakness Classification (1)

Affected Software (3)

VendorProductVersion
Microsoft Microsoft 365 Copilot -
Microsoft Microsoft 365 Copilot -
microsoft 365_copilot -

References & Advisories (1)

Bug Bounty Relevance

70 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

9.9 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C

EPSS — Exploitation Probability

1.69%
Raw Score 0.016940
Percentile 77.0%
Date 2026-10-28

Intelligence Sources

mitre ref →
nvd ref →

External Links