What is CVE-2026-33281?

CVE-2026-33281 is a medium-severity vulnerability in Ellanetworks Core, classified under Improper Validation of Array Index. CVSS score: 6.5/10. Published 2026-03-24.

How severe is CVE-2026-33281?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Ellanetworks Core

CVE-2026-33281

Ella Core is a 5G core designed for private networks. Versions prior to 1.6.0 panic when processing NGAP messages with invalid PDU Session IDs outside of 1-15. An attacker able to send crafted NGAP messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required. Version 1.6.0 added PDU Session ID validations during NGAP message handling.

EPSS: 0.004 (32.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Ellanetworks Core — versions < 1.6.0
Ellanetworks Ella_core

Weakness classification (CWE)

CWE-129 — Improper Validation of Array Index

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-33281?: CVE-2026-33281 is a medium-severity vulnerability in Ellanetworks Core, classified under Improper Validation of Array Index. CVSS score: 6.5/10. Published 2026-03-24.
How severe is CVE-2026-33281?: Medium severity. CVSS v3 base score is 6.5 out of 10.