CVE-2026-7781

MEDIUM

Open5GS amf-3gpp-access Endpoint nudm-handler.c udm_nudm_uecm_handle_amf_registration_update denial of service

Title source: cna
STIX 2.1

Description

A security vulnerability has been detected in Open5GS up to 2.7.7. Affected by this issue is the function udm_nudm_uecm_handle_amf_registration_update of the file /src/udm/nudm-handler.c of the component amf-3gpp-access Endpoint. The manipulation leads to denial of service. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.

References (5)

Core 5
Core References
Vdb Entry, Technical Description vdb-entry technical-description
VDB-360978 | Open5GS amf-3gpp-access Endpoint nudm-handler.c udm_nudm_uecm_handle_amf_registration_update denial of service
https://vuldb.com/vuln/360978
Signature, Permissions Required signature permissions-required
VDB-360978 | CTI Indicators (IOB, IOC, TTP, IOA)
https://vuldb.com/vuln/360978/cti
Third Party Advisory third-party-advisory
Submit #806251 | Open5gs UDM v2.7.7 Denial of Service
https://vuldb.com/submit/806251
Exploit exploit issue-tracking
https://github.com/open5gs/open5gs/issues/4420

Scores

CVSS v3 4.3
EPSS 0.0027
EPSS Percentile 18.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-404
Status published
Products (8)
None/Open5GS 2.7.0
None/Open5GS 2.7.1
None/Open5GS 2.7.2
None/Open5GS 2.7.3
None/Open5GS 2.7.4
None/Open5GS 2.7.5
None/Open5GS 2.7.6
None/Open5GS 2.7.7
Published May 04, 2026
Tracked Since May 05, 2026