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Vulnerability record · CVE-2026-33907 · published 27 March 2026

CVE-2026-33907: Ellanetworks ella core null pointer dereference vulnerability

Ellanetworks · Ella Core

Ella Core is a 5G core designed for private networks. Versions prior to 1.7.0 panic when processing Authentication Response and Authentication Failure NAS message missing IEs. An attacker able to send crafted NAS messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required. Version 1.7.0 added IE presence verification to NAS message handling.

6.5 CVSS 3.1 Medium EPSS 0.39% · top 70.0% CWE-476 · NULL pointer dereference
6.5CVSS 3.1 base score
0.39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

Description

Ella Core is a 5G core designed for private networks. Versions prior to 1.7.0 panic when processing Authentication Response and Authentication Failure NAS message missing IEs. An attacker able to send crafted NAS messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required. Version 1.7.0 added IE presence verification to NAS message handling.

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/ellanetworks/core/commit/52962660e3bd3e23c7e96b0da270ac1e0e705273 Patch
https://github.com/ellanetworks/core/releases/tag/v1.7.0 Release Notes
https://github.com/ellanetworks/core/security/advisories/GHSA-55q8-2gwx-29pc Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-33907), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.