What is CVE-2026-7781?

CVE-2026-7781 is a medium-severity vulnerability in Open5gs, classified under Improper Resource Shutdown or Release. CVSS score: 4.3/10. Published 2026-05-04.

How severe is CVE-2026-7781?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Open5gs

CVE-2026-7781

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 manip…

EPSS: 0.000 (13.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

Affected products

N/a Open5gs — versions 2.7.0, 2.7.1, 2.7.2

Weakness classification (CWE)

CWE-404 — Improper Resource Shutdown or Release

References

VDB-360978 | Open5GS amf-3gpp-access Endpoint nudm-handler.c udm_nudm_uecm_handle_amf_registration_update denial of service (technical-description, vdb-entry)
VDB-360978 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, permissions-required)
Submit #806251 | Open5gs UDM v2.7.7 Denial of Service (third-party-advisory)
cna@vuldb.com (issue-tracking, exploit)
cna@vuldb.com (product)

Frequently asked questions

What is CVE-2026-7781?: CVE-2026-7781 is a medium-severity vulnerability in Open5gs, classified under Improper Resource Shutdown or Release. CVSS score: 4.3/10. Published 2026-05-04.
How severe is CVE-2026-7781?: Medium severity. CVSS v3 base score is 4.3 out of 10.