What’s Vulnerable › Vulnerabilities

CVE-2026-33907: Ella Core Panics during NAS Authentication Response/Failure with missing IEs

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-27 · updated 2026-10-26
• Weakness: CWE-476

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.

Affected products

• ellanetworks core: before 1.7.0 — fixed in 1.7.0

How to fix

Upgrade to a fixed version: ellanetworks core 1.7.0. Check the vendor advisory for mitigations.

References

• https://github.com/ellanetworks/core/commit/52962660e3bd3e23c7e96b0da270ac1e0e705273
• https://github.com/ellanetworks/core/releases/tag/v1.7.0
• https://github.com/ellanetworks/core/security/advisories/GHSA-55q8-2gwx-29pc

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