CVE-2025-56394Public exploitNetwork attack vector

Unauthenticated service crash via mobile identity parsing

Published Sep 23, 2025 · Updated Sep 23, 2025

Buffer overflow in the free5GC 4.0.1 AMF allows remote attackers to crash the service via a crafted 5GS mobile identity. MobileIdentity5GS.GetSUCI reads index five from a five-byte identity slice because Registration Request processing does not reject the short field. Access to the AMF N2 SCTP interface is sufficient to trigger a pre-authentication Go runtime panic and interrupt AMF service for the 5G core.

CVSS severity7.5
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in the free5GC 4.0.1 AMF allows remote attackers to crash the service via a crafted 5GS mobile identity. MobileIdentity5GS.GetSUCI reads index five from a five-byte identity slice because Registration Request processing does not reject the short field. Access to the AMF N2 SCTP interface is sufficient to trigger a pre-authentication Go runtime panic and interrupt AMF service for the 5G core.

The record

CVE
CVE-2025-56394
Published
Sep 23, 2025
Updated
Sep 23, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-122, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 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

7.5CISA-ADPCVSS: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-122Heap-based 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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