CVE-2026-82547Public exploitNetwork attack vectorHinoki check available

Unauthenticated network registration via premature state transition

Published Aug 30, 2026 · Updated Aug 30, 2026

Improper authentication in Magma 1.9.0 allows remote attackers to register unauthenticated devices via crafted NGAP messages. The Registration Complete handler in tasks/amf/amf_fsm.cpp accepts a Registration Complete after InitialUEMessage and moves the UE to REGISTERED_CONNECTED without authentication or security-mode establishment. A 5G-enabled core reachable through its NGAP interface is exposed; successful requests establish an unauthorized registered state and can crash the MME, interrupting service.

CVSS severity6.5
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper authentication in Magma 1.9.0 allows remote attackers to register unauthenticated devices via crafted NGAP messages. The Registration Complete handler in tasks/amf/amf_fsm.cpp accepts a Registration Complete after InitialUEMessage and moves the UE to REGISTERED_CONNECTED without authentication or security-mode establishment. A 5G-enabled core reachable through its NGAP interface is exposed; successful requests establish an unauthorized registered state and can crash the MME, interrupting service.

The record

CVE
CVE-2026-82547
Published
Aug 30, 2026
Updated
Aug 30, 2026
Vendor
Linux Foundation
Product
Magma
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 30, 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=1.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Linux Foundation · Magmaversion=1.9.0

Published CVSS scores

6.9TenableCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
6.5TenableCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
6.4TenableAV:N/AC:L/Au:N/C:N/I:P/A:P

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-287Improper Authentication
T1190Exploit Public-Facing Application

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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