CVE-2026-5661

A vulnerability was identified in Free5GC 4.2.0. This affects an unknown function of the component NGSetupRequest Handler. Such manipulation leads to denial of service. The attack may be launched remotely. The exploit is publicly available and might be used.

CVSS v4.0

5.5 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v2.0

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS

0.42% chance of exploitation in the next 30 days, 35th percentile

Published

2026-04-06

Proof-of-concept exploits (1)

• user-attachments/files/25581199/amfcfg.yaml

References

• CVE Record
• NVD entry

Related

• CVE-2026-5660
• CVE-2026-5665
• CVE-2026-5659
• CVE-2026-56657
• CVE-2026-5650
• CVE-2026-5666