Medium severity · published Apr 6, 2026
CVE-2026-5661
Free5GC NGSetupRequest denial of service
5.3
CVSS
0.4%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
Free5GC · Free5gc
4.2.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5661
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5661
github.com
https://github.com/free5gc/amf/pull/201
github.com
https://github.com/free5gc/free5gc/
github.com
https://github.com/free5gc/free5gc/issues/832
github.com
https://github.com/user-attachments/files/25581199/amfcfg.yaml
vuldb.com
https://vuldb.com/submit/785896
vuldb.com
https://vuldb.com/vuln/355485
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