Is CVE-2026-7781 actively exploited?

No active exploitation of CVE-2026-7781 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-7781 be exploited remotely?

Yes. CVE-2026-7781 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-7781?

CVE-2026-7781 has a CVSS score of 4.3 (MEDIUM).

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MEDIUM

CVE-2026-7781

CWE-404Published: May 4, 2026· Updated: May 5, 2026

4.3

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:11.5th

Official 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.

NVD Source

Technical Analysis

CVE-2026-7781 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.