Is CVE-2026-4531 actively exploited?

No active exploitation of CVE-2026-4531 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-4531 be exploited remotely?

Yes. CVE-2026-4531 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-4531?

CVE-2026-4531 has a CVSS score of 5.3 (MEDIUM).

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MEDIUM

CVE-2026-4531

CWE-404Published: March 22, 2026· Updated: Mar 23, 2026

5.3

CVSS v3.1

EPSS:0.06%probability of exploitation in 30 daysPercentile:17.8th

Official Description

A weakness has been identified in Free5GC 4.1.0. Affected is the function HandleRegistrationComplete of the file internal/gmm/handler.go of the component AMF. Executing a manipulation can lead to denial of service. The attack may be performed from remote. This patch is called 52e9386401ce56ea773c5aa587d4cdf7d53da799. It is best practice to apply a patch to resolve this issue.

NVD Source

Technical Analysis

CVE-2026-4531 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.