Critical severity · published Jan 23, 2026
CVE-2025-66719
An issue was discovered in Free5gc NRF 1.4.0
9.1
CVSS
0.4%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NR
Nrf · Free5gc
1.4.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-66719
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-66719
Exploit
https://github.com/free5gc/free5gc/issues/736
Issue Tracking
https://github.com/free5gc/nrf/pull/73
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