CVE-2025-66719

Name: CVE-2025-66719
Creator: NVD / NIST
Published: 2026-01-23T16:15:51.22+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 0.31%

Last modified Jun 17, 2026

CVE-2025-66719 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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. EPSS estimates a 0.31% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.1/10

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

EPSS Probability

0.31%

22.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

Affected Software

Vendor	Product	Versions
Free5gc	Nrf	1.4.0

References

https://github.com/free5gc/free5gc/issues/736Exploit, Issue Tracking
https://github.com/free5gc/nrf/pull/73Issue Tracking, Patch

Timeline

Published: Jan 23, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-66719?

How severe is CVE-2025-66719?

CVE-2025-66719 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.

How do I fix CVE-2025-66719?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-66719?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST