Is CVE-2025-70121 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2025-70121, but active exploitation has not been confirmed.

Can CVE-2025-70121 be exploited remotely?

Yes. CVE-2025-70121 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-70121?

CVE-2025-70121 has a CVSS score of 7.5 (HIGH) and an EPSS exploitation probability of 0.14%.

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HIGHPOC

CVE-2025-70121

CWE-125Published: February 13, 2026· Updated: Feb 18, 2026

7.5

CVSS v3.1

EPSS:0.14%probability of exploitation in 30 daysPercentile:34.2th

Official Description

An array index out of bounds vulnerability in the AMF component of free5GC v4.0.1 allows remote attackers to cause a denial of service via a crafted 5GS Mobile Identity in a NAS Registration Request message. The issue occurs in the GetSUCI method (NAS_MobileIdentity5GS.go) when accessing index 5 of a 5-element array, leading to a runtime panic and AMF crash.

NVD Source

Technical Analysis

CVE-2025-70121 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 7.5.

A proof-of-concept (PoC) exploit exists for CVE-2025-70121. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.