CVE-2026-33907

Service crash via unchecked missing NAS elements

Published Mar 27, 2026 · Updated Mar 27, 2026

NULL pointer dereference in Ella Networks Ella Core before 1.7.0 allows attackers to crash the service via crafted NAS messages. The AMF Authentication Response handler calls GetRES on an absent AuthenticationResponseParameter, while the Synchronization Failure path slices and hex-encodes an absent AuthenticationFailureParameter. Unauthenticated attackers with adjacent-network access can terminate the core process and disrupt service for all connected subscribers.

CVSS severity6.5
Medium
EPSS probability0.24%
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 Ella Networks Ella Core before 1.7.0 allows attackers to crash the service via crafted NAS messages. The AMF Authentication Response handler calls GetRES on an absent AuthenticationResponseParameter, while the Synchronization Failure path slices and hex-encodes an absent AuthenticationFailureParameter. Unauthenticated attackers with adjacent-network access can terminate the core process and disrupt service for all connected subscribers.

The record

CVE
CVE-2026-33907
Published
Mar 27, 2026
Updated
Mar 27, 2026
Vendor
Ella Networks
Product
Ella Core
Classifications
CWE-476, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 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=< 1.7.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Ella Networks · Ella Coreversion=< 1.7.0

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:A/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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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