CVE-2025-69252Public exploitNetwork attack vector

Service crash via unmatched UE identifier

Published Feb 23, 2026 · Updated Feb 23, 2026

NULL pointer dereference in free5GC UDM 1.4.1 and earlier allows remote attackers to crash the service via a crafted PUT request. The Nudm_UECM RegistrationAmf3gppAccess handler accepts an unmatched ueId, receives a 204 response from UDR, then dereferences a nil AMF context. The API path must be network-reachable; exploitation requires no privileges or user interaction and interrupts UDM availability.

CVSS severity7.5
High
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in free5GC UDM 1.4.1 and earlier allows remote attackers to crash the service via a crafted PUT request. The Nudm_UECM RegistrationAmf3gppAccess handler accepts an unmatched ueId, receives a 204 response from UDR, then dereferences a nil AMF context. The API path must be network-reachable; exploitation requires no privileges or user interaction and interrupts UDM availability.

The record

CVE
CVE-2025-69252
Published
Feb 23, 2026
Updated
Feb 23, 2026
Vendor
free5GC
Product
Unified Data Management (UDM)
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 23, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 1.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

free5GC · Unified Data Management (UDM)version=<= 1.4.1

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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