CVE-2023-50019Public exploitNetwork attack vector

Unauthenticated AMF crash via unhandled delayed response

Published Jan 2, 2024 · Updated Apr 17, 2025

Denial of service in the AMF of Open5GS 2.6.6 allows remote attackers to crash the process via timed UE registration requests. The gmm_state_authentication handler lacks a case for a delayed Nudm_UECM_Registration response and routes it to a fatal assertion. Network access to the AMF and control of a gNB and UE using the same IMSI can trigger the timing window, interrupting AMF service without exposing or altering data.

CVSS severity5.9
Medium
EPSS probability0.64%
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 the AMF of Open5GS 2.6.6 allows remote attackers to crash the process via timed UE registration requests. The gmm_state_authentication handler lacks a case for a delayed Nudm_UECM_Registration response and routes it to a fatal assertion. Network access to the AMF and control of a gNB and UE using the same IMSI can trigger the timing window, interrupting AMF service without exposing or altering data.

The record

CVE
CVE-2023-50019
Published
Jan 2, 2024
Updated
Apr 17, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-755, CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 17, 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

5.9NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
5.9CISA-ADPCVSS:3.1/AV:N/AC:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-755Improper Handling of Exceptional Conditions
CWE-400Uncontrolled Resource Consumption
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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