RCE in Microsoft 365 Copilot's Business Chat

CVE-2025-53787

Microsoft 365 Copilot BizChat Information Disclosure Vulnerability

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.028 (86.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-53787?
CVE-2025-53787 is a high-severity vulnerability in Microsoft 365 Copilot's Business Chat, classified under Command Injection. CVSS score: 8.2/10. Published 2025-08-07.
How severe is CVE-2025-53787?
High severity. CVSS v3 base score is 8.2 out of 10.