Is CVE-2026-4988 actively exploited?

No active exploitation of CVE-2026-4988 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-4988 be exploited remotely?

Yes. CVE-2026-4988 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-4988?

CVE-2026-4988 has a CVSS score of 5.9 (MEDIUM).

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MEDIUM

CVE-2026-4988

CWE-404Published: March 27, 2026· Updated: Mar 30, 2026

5.9

CVSS v3.1

EPSS:0.06%probability of exploitation in 30 daysPercentile:17.9th

Official Description

A security flaw has been discovered in Open5GS 2.7.6. This issue affects the function smf_gx_cca_cb/smf_gy_cca_cb/smf_s6b of the component CCA Message Handler. The manipulation results in denial of service. The attack may be launched remotely. Attacks of this nature are highly complex. The exploitability is assessed as difficult. The exploit has been released to the public and may be used for attacks.

NVD Source

Technical Analysis

CVE-2026-4988 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.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.9.