What is the CVSS score of CVE-2025-63679?

CVE-2025-63679 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-2025-63679?

Organizations using free5gc v4.1.0 and before face notable risk from CVE-2025-63679, a buffer overflow vulnerability rated CVSS 7.5.

Is there a public PoC exploit available for CVE-2025-63679?

Yes, a public proof-of-concept exploit is available for CVE-2025-63679. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-63679?

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-2025-63679

HIGH

Classic Buffer Overflow (CWE-120)

2025-11-12 cve@mitre.org

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 - 19:21 vuln.today

PoC Detected

Dec 31, 2025 - 16:12 vuln.today

Public exploit code

CVE Published

Nov 12, 2025 - 19:15 nvd

HIGH 7.5

DescriptionCVE.org

free5gc v4.1.0 and before is vulnerable to Buffer Overflow. When AMF receives an UplinkRANConfigurationTransfer NGAP message from a gNB, the AMF process crashes.

AnalysisAI

free5gc v4.1.0 and before 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 as Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. free5gc v4.1.0 and before is vulnerable to Buffer Overflow. When AMF receives an UplinkRANConfigurationTransfer NGAP message from a gNB, the AMF process crashes. Affected products include: Free5Gc.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Always validate buffer sizes before copy operations. Use bounded functions (strncpy, snprintf). Enable compiler protections.

CVE-2025-63679 vulnerability details – vuln.today

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Free5gc CVE-2025-63679

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code