What is the CVSS score of CVE-2025-70123?

CVE-2025-70123 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.2%.

Which versions of Free5gc are affected by CVE-2025-70123?

A denial of service vulnerability in free5GC v4.0.1 affects organizations running this 5G core network software, potentially disrupting mobile network services.

Is there a public PoC exploit available for CVE-2025-70123?

Yes, a public proof-of-concept exploit is available for CVE-2025-70123. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2025-70123?

Within 24 hours: Inventory all free5GC v4.0.1 deployments and assess exposure to untrusted networks; implement network access controls to restrict PFCP protocol traffic to trusted sources only. Within 7 days: Deploy compensating controls including PFCP traffic filtering and rate limiting; establish continuous monitoring for malformed PFCP Association Setup Requests. Within 30 days: Evaluate migration to alternative 5G core solutions or upgrade to free5GC v4.0.2 or later once patches are released; conduct vulnerability reassessment post-remediation.

Free5gc CVE-2025-70123

HIGH

Improper Input Validation (CWE-20)

2026-02-13 cve@mitre.org

Denial Of Service Free5gc

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:02 vuln.today

PoC Detected

Feb 18, 2026 - 15:40 vuln.today

Public exploit code

CVE Published

Feb 13, 2026 - 17:16 nvd

HIGH 7.5

DescriptionCVE.org

An improper input validation and protocol compliance vulnerability in free5GC v4.0.1 allows remote attackers to cause a denial of service. The UPF incorrectly accepts a malformed PFCP Association Setup Request, violating 3GPP TS 29.244. This places the UPF in an inconsistent state where a subsequent valid PFCP Session Establishment Request triggers a cascading failure, disrupting the SMF connection and causing service degradation.

AnalysisAI

Technical ContextAI

Classified as CWE-20 (Improper Input Validation). Affects Free5Gc. An improper input validation and protocol compliance vulnerability in free5GC v4.0.1 allows remote attackers to cause a denial of service. The UPF incorrectly accepts a malformed PFCP Association Setup Request, violating 3GPP TS 29.244. This places the UPF in an inconsistent state where a subsequent valid PFCP Session Establishment Request triggers a cascading failure, disrupting the SMF connection and causing service degradation.

RemediationAI

Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.

CVE-2025-70123 vulnerability details – vuln.today

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Free5gc CVE-2025-70123

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code