CVE-2026-33283Network attack vector

Process crash via missing NAS Request Type

Published Mar 23, 2026 · Updated Mar 23, 2026

NULL pointer dereference in Ella Networks Ella Core before 1.6.0 allows remote attackers to crash the process via a malformed NAS message. The UL NAS Transport handler processes a message lacking Request Type while no SM Context exists and dereferences the absent value instead of rejecting the invalid state. No authentication is required; a crafted message received through the 5G signaling path terminates the core and disrupts service for all connected subscribers.

CVSS severity6.5
Medium
EPSS probability0.36%
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 1.6.0 allows remote attackers to crash the process via a malformed NAS message. The UL NAS Transport handler processes a message lacking Request Type while no SM Context exists and dereferences the absent value instead of rejecting the invalid state. No authentication is required; a crafted message received through the 5G signaling path terminates the core and disrupts service for all connected subscribers.

The record

CVE
CVE-2026-33283
Published
Mar 23, 2026
Updated
Mar 23, 2026
Vendor
Ella Networks
Product
Ella Core
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 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=< 1.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ella Networks · Ella Coreversion=< 1.6.0

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS: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.

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 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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