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01 Record

CVE-2026-44320

free5GC: NEF nnef-callback route group is unauthenticated; forged callback requests are accepted into the processing path

HighPUBLISHEDCNA: GitHub_M
CNA base score7.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

02 Description

free5GC: NEF nnef-callback route group is unauthenticated; forged callback requests are accepted into the processing path

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.24% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 15.0% of scored records. A rank, not a probability.
NVD base score
7.3 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
NVD analysis status
Analyzed. NVD last modified this record on 2026-10-14.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-05-27 15:48Z5 MO AGO
Last updated
2026-05-27 17:44Z5 MO AGO
Reserved
2026-05-05
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
High (CVSS 7.3)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Weaknesses
  • CWE-306Missing Authentication for Critical FunctionBase
  • CWE-862Missing AuthorizationClass
Data version
5.2
Document digest
63c91d08cda9f0b0bfa18beeae8cca86b85a0add8fbee540eadedeb4e7b3cf81

05 Affected products

VendorProductVersionsPlatforms
free5gcfree5gc< 4.2.2—

06 References