Vulnerability in Ellanetworks Core
CVE-2026-33904
Ella Core is a 5G core designed for private networks. Prior to version 1.7.0, a deadlock in the AMF's SCTP notification handler causes the entire AMF control plane to hang until the process is restarted. An attacker with access to the N2 interface can cause Ella Core to hang, resulting in a denial of service for all subscribers. Version 1.7.0 adds deferred Radio cleanup in serveConn SCTP server so that every connection exit path removes the radio. Remove the stale-entry scan from SCTP Notification handling.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (16.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 16.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Ellanetworks Core — versions < 1.7.0
- Ellanetworks Ella Core
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-33904?
- CVE-2026-33904 is a medium-severity vulnerability in Ellanetworks Core, classified under CWE-833. CVSS score: 6.5/10. Published 2026-03-27.
- How severe is CVE-2026-33904?
- Medium severity. CVSS v3 base score is 6.5 out of 10.