Free5GC 1.4.0 access_token.go AccessTokenScopeCheck targetNF access control

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Free5GC 1.4.0. Affected by this vulnerability is the function AccessTokenScopeCheck of the file internal/sbi/processor/access_token.go. The manipulation of the argument targetNF leads to access control. This vulnerability is uniquely identified as CVE-2025-66719. The attack is possible to be carried out remotely. No exploit exists. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in Free5GC 1.4.0 and classified as critical. This issue affects the function AccessTokenScopeCheck of the file internal/sbi/processor/access_token.go. The manipulation of the argument targetNF with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2025-66719 since 12/08/2025. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.5

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 9.1
ADP CISA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: github.com

Timelineinfo

12/08/2025 CVE reserved
01/23/2026 +46 days Advisory disclosed
01/23/2026 +0 days VulDB entry created
02/12/2026 +20 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 736
Status: Confirmed

CVE: CVE-2025-66719 (🔒)
GCVE (CVE): GCVE-0-2025-66719
GCVE (VulDB): GCVE-100-342617

Entryinfo

Created: 01/23/2026 17:40
Updated: 02/12/2026 01:57
Changes: 01/23/2026 17:40 (57), 02/12/2026 01:57 (11)
Complete: 🔍
Cache ID: 216::103

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