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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.

PUBLISHED Reserved 2026-05-04 | Published 2026-05-04 | Updated 2026-05-04 | Assigner VulDB




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
MEDIUM: 4.3CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
4.0AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR

Problem types

Denial of Service

Timeline

2026-05-04:Advisory disclosed
2026-05-04:VulDB entry created
2026-05-04:VulDB entry last update

Credits

FrankyLin (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/360978 (VDB-360978 | Open5GS amf-3gpp-access Endpoint nudm-handler.c udm_nudm_uecm_handle_amf_registration_update denial of service) vdb-entry technical-description

vuldb.com/vuln/360978/cti (VDB-360978 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/submit/806251 (Submit #806251 | Open5gs UDM v2.7.7 Denial of Service) third-party-advisory

github.com/open5gs/open5gs/issues/4420 exploit issue-tracking

github.com/open5gs/open5gs/ product

cve.org (CVE-2026-7781)

nvd.nist.gov (CVE-2026-7781)

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