What is CVE-2025-59286?

CVE-2025-59286 is a critical-severity vulnerability in Microsoft 365 Copilot's Business Chat, classified under Command Injection. CVSS score: 9.3/10. Published 2025-10-09.

How severe is CVE-2025-59286?

Critical severity. CVSS v3 base score is 9.3 out of 10.

Is CVE-2025-59286 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Microsoft 365 Copilot's Business Chat

CVE-2025-59286

Improper neutralization of special elements used in a command ('command injection') in Copilot allows an unauthorized attacker to disclose information over a network.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.001 (30.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N/E:U/RL:O/RC:C.

Affected products

Microsoft 365 Copilot's Business Chat

Weakness classification (CWE)

CWE-77 — Command Injection

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

Copilot Information Disclosure Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2025-59286?: CVE-2025-59286 is a critical-severity vulnerability in Microsoft 365 Copilot's Business Chat, classified under Command Injection. CVSS score: 9.3/10. Published 2025-10-09.
How severe is CVE-2025-59286?: Critical severity. CVSS v3 base score is 9.3 out of 10.
Is CVE-2025-59286 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.