Description
Deserialization of untrusted data in M365 Copilot allows an authorized attacker to execute code over a network.
Published: 2026-07-24
Score: 9.9 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Fri, 24 Jul 2026 00:30:00 +0000

Type Values Removed Values Added
Description Deserialization of untrusted data in M365 Copilot allows an authorized attacker to execute code over a network.
Title Microsoft M365 Copilot Remote Code Execution Vulnerability
First Time appeared Microsoft
Microsoft 365 Copilot
Weaknesses CWE-502
CPEs cpe:2.3:a:microsoft:365_copilot:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft 365 Copilot
References
Metrics cvssV3_1

{'score': 9.9, 'vector': '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'}

Subscriptions

Microsoft 365 Copilot
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-07-24T00:01:11.819Z

Reserved: 2026-06-04T19:00:41.292Z

Link: CVE-2026-50517

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses