CVE-2025-70121Public exploitNetwork attack vector

AMF crash via unchecked mobile identity index

Published Feb 13, 2026 · Updated Feb 13, 2026

Array out-of-bounds access in free5GC AMF 4.0.1 allows remote attackers to crash the service via a crafted NAS Registration Request. GetSUCI in NAS_MobileIdentity5GS.go reads index 5 from a five-element array while parsing the message's malformed 5GS Mobile Identity, triggering a Go runtime panic. No authentication is required, and successful exploitation terminates the AMF service and interrupts 5G core access until the service is restored.

CVSS severity7.5
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Array out-of-bounds access in free5GC AMF 4.0.1 allows remote attackers to crash the service via a crafted NAS Registration Request. GetSUCI in NAS_MobileIdentity5GS.go reads index 5 from a five-element array while parsing the message's malformed 5GS Mobile Identity, triggering a Go runtime panic. No authentication is required, and successful exploitation terminates the AMF service and interrupts 5G core access until the service is restored.

The record

CVE
CVE-2025-70121
Published
Feb 13, 2026
Updated
Feb 13, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2026Record 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-125Out-of-bounds Read
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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