CVE-2026-33907

low-risk
Published 2026-03-27

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.

Do I need to act?

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0.05% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10 Medium
ADJACENT_NETWORK / LOW complexity

Affected Products (1)

Ella Core

Affected Vendors

Ellanetworks

References (3)

Patch https://github.com/ellanetworks/core/commit/52962660e3bd3e23c7e96b0da270ac1e0e70...
Release Notes https://github.com/ellanetworks/core/releases/tag/v1.7.0
Vendor Advisory https://github.com/ellanetworks/core/security/advisories/GHSA-55q8-2gwx-29pc
26
/ 100
low-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal