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Public proof of conceptFix available

CVE-2025-66719

A public proof of concept exists; no exploitation attested.

  • Published2026-01-23
  • Fixed in1.4.1
  • WeaknessCWE-863

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-01-2316:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2025-66719?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2025-66719?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV · NVD
free5gc/nrf
BranchAffectedFixed in
1.4< 1.4.11.4.1
Free5gc nrf
BranchAffectedFixed in
1.4= 1.4.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update free5gc/nrf to 1.4.1

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
2026-01-23
Last Modified
2026-06-17
NVD status
Analyzed

Frequently asked questions

What is 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.

Is CVE-2025-66719 actively exploited?

A proof-of-concept exploit exists for CVE-2025-66719, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2025-66719?

CVE-2025-66719 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

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