CVE-2025-63679Public exploitNetwork attack vector

Unauthenticated AMF crash via missing gNB identifier

Published Nov 12, 2025 · Updated Nov 13, 2025

Denial of service in free5GC 4.1.0 and earlier allows remote attackers to crash the AMF via a crafted NGAP message. The handleUplinkRANConfigurationTransferMain function dereferences an absent gNB identifier instead of rejecting the malformed message. A gNB connection to the AMF NGAP interface is required; one malformed message triggers a nil-pointer panic that stops the AMF process.

CVSS severity7.5
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in free5GC 4.1.0 and earlier allows remote attackers to crash the AMF via a crafted NGAP message. The handleUplinkRANConfigurationTransferMain function dereferences an absent gNB identifier instead of rejecting the malformed message. A gNB connection to the AMF NGAP interface is required; one malformed message triggers a nil-pointer panic that stops the AMF process.

The record

CVE
CVE-2025-63679
Published
Nov 12, 2025
Updated
Nov 13, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 12, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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