What is CVE-2025-66719?

CVE-2025-66719 is a critical-severity vulnerability in Free5gc Nrf, classified under Incorrect Authorization. CVSS score: 9.1/10. Published 2026-01-23.

How severe is CVE-2025-66719?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Free5gc Nrf

CVE-2025-66719

An issue was discovered in Free5gc NRF 1.4.0. In the access-token generation logic of free5GC, the AccessTokenScopeCheck() function in file internal/sbi/processor/access_token.go bypasses all scope validation when the attacker uses a crafted targetNF value. This allows attackers to obtain an access token with any arbitrary scope.

Vulnerability class: Broken Access Control

EPSS: 0.003 (23.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Free5gc Nrf — versions 1.4.0
N/a — versions n/a

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

cve@mitre.org (Exploit, Issue Tracking)
cve@mitre.org (Patch, Issue Tracking)

Frequently asked questions

What is CVE-2025-66719?: CVE-2025-66719 is a critical-severity vulnerability in Free5gc Nrf, classified under Incorrect Authorization. CVSS score: 9.1/10. Published 2026-01-23.
How severe is CVE-2025-66719?: Critical severity. CVSS v3 base score is 9.1 out of 10.