What is CVE-2025-64671?

CVE-2025-64671 is a high-severity vulnerability in Microsoft GitHub Copilot, classified under Command Injection. CVSS score: 8.4/10. Published 2025-12-09.

How severe is CVE-2025-64671?

High severity. CVSS v3 base score is 8.4 out of 10.

RCE in Microsoft GitHub Copilot

CVE-2025-64671

Improper neutralization of special elements used in a command ('command injection') in Copilot allows an unauthorized attacker to execute code locally.

Vulnerability class: Command Injection (OS Command Injection)

Published 2025-12-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (27.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Microsoft GitHub Copilot
Microsoft GitHub Copilot Plugin For Jetbrains Ides — versions 1.0.0

Weakness classification (CWE)

CWE-77 — Command Injection

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-64671 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-64671?: CVE-2025-64671 is a high-severity vulnerability in Microsoft GitHub Copilot, classified under Command Injection. CVSS score: 8.4/10. Published 2025-12-09.
How severe is CVE-2025-64671?: High severity. CVSS v3 base score is 8.4 out of 10.