CVE-2025-66719 — CRITICAL (9.1)

Vulnerability Description

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.

CVSS Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Free5Gc	Nrf	1.4.0

Related Weaknesses (CWE)

CWE-863

References

https://github.com/free5gc/free5gc/issues/736ExploitIssue Tracking
https://github.com/free5gc/nrf/pull/73Issue TrackingPatch

FAQ

What is CVE-2025-66719?

CVE-2025-66719 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 va...

How severe is CVE-2025-66719?

CVE-2025-66719 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2025-66719?

Check the references section above for vendor advisories and patch information. Affected products include: Free5Gc Nrf.