What is the CVSS score of CVE-2025-56394?

CVE-2025-56394 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: 0.1%.

Which versions of Free5gc are affected by CVE-2025-56394?

Organizations using Free5gc 4.0.1 face notable risk from CVE-2025-56394, a heap-based buffer overflow vulnerability rated CVSS 7.5.

Is there a public PoC exploit available for CVE-2025-56394?

Yes, a public proof-of-concept exploit is available for CVE-2025-56394. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-56394?

Within 30 days: Identify all affected systems and apply vendor patches as part of regular patch cycle. If patching is delayed, consider network segmentation to limit exposure.

Free5gc CVE-2025-56394

HIGH

Heap-based Buffer Overflow (CWE-122)

2025-09-23 cve@mitre.org

Heap Overflow Buffer Overflow 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 28, 2026 - 19:13 vuln.today

PoC Detected

Oct 08, 2025 - 17:56 vuln.today

Public exploit code

CVE Published

Sep 23, 2025 - 18:15 nvd

HIGH 7.5

DescriptionCVE.org

Free5gc 4.0.1 is vulnerable to Buffer Overflow. The AMF incorrectly validates the 5GS mobile identity, resulting in slice reference overflow.

AnalysisAI

Free5gc 4.0.1 is vulnerable to Buffer Overflow. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-122. Free5gc 4.0.1 is vulnerable to Buffer Overflow. The AMF incorrectly validates the 5GS mobile identity, resulting in slice reference overflow. Affected products include: Free5Gc.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

CVE-2025-56394 vulnerability details – vuln.today

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Free5gc CVE-2025-56394

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code