What is CVE-2025-53787?

CVE-2025-53787 is a high-severity vulnerability in Microsoft 365 Copilot 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.

RCE in Microsoft 365 Copilot Chat

CVE-2025-53787

Microsoft 365 Copilot BizChat Information Disclosure Vulnerability

Vulnerability class: Command Injection (OS Command Injection)

Published 2025-08-07 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.007 (52.8th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-77 — Command Injection

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53787 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-53787?: CVE-2025-53787 is a high-severity vulnerability in Microsoft 365 Copilot 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.