NULL pointer dereference in Ellanetworks Core
CVE-2026-33903
Ella Core is a 5G core designed for private networks. Versions prior to 1.7.0 panic when processing a specially crafted NGAP LocationReport message. An attacker able to send crafted NGAP messages to Ella Core can crash the process, causing service disruption for all connected subscribers. Version 1.7.0 adds guards in NGAP Location Report handler.
EPSS: 0.002 (10.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Ellanetworks Core — versions < 1.7.0
- Ellanetworks Ella_core
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-33903?
- CVE-2026-33903 is a medium-severity vulnerability in Ellanetworks Core, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2026-03-27.
- How severe is CVE-2026-33903?
- Medium severity. CVSS v3 base score is 6.5 out of 10.