TI-2026-25694 Aliases CVE-2026-33283 GHSA-3366-gw57-fcm5

Ella Core panics on malformed ULNASTransport Message without a Request Type

LOW 33CWE-476Published 2026-03-23 · Updated 2026-03-24

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-476.

Summary

Ella Core is a 5G core designed for private networks. Versions prior to 1.6.0 panic when processing malformed UL NAS Transport NAS messages without a Request Type. 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 1.6.0 adds a guard when receiving an UL NAS Message without a Request Type given no SM Context.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00379 32nd percentileScored 2026-11-07

Fix Fixed core (ellanetworks): 1.6.0github.com/ellanetworks/core (Go): 1.6.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
ellanetworks	core	before 1.6.0	1.6.0	Patch available	CNA
—	github.com/ellanetworks/core (Go)	before 1.6.0	1.6.0	Patch available	GHSA-3366-gw57-fcm5

core Vendorellanetworks Affected before 1.6.0 Fixed in 1.6.0 Patch available CNA
github.com/ellanetworks/core (Go) Vendor— Affected before 1.6.0 Fixed in 1.6.0 Patch available GHSA-3366-gw57-fcm5

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:ellanetworks:ella_core::::::::	before 1.6.0	Vulnerable	ellanetworks

cpe:2.3:a:ellanetworks:ella_core:*:*:*:*:*:*:*:* Versions before 1.6.0 Vulnerable ·ellanetworks

Remediation

Fix · CNA core (ellanetworks) Fixed in 1.6.0
Fix · GHSA-3366-gw57-fcm5 github.com/ellanetworks/core (Go) Fixed in 1.6.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-33283
2026-10-03 Alias added: GHSA-3366-gw57-fcm5

References

Advisory 2

Other 1

https://github.com/ellanetworks/core

TI-2026-24847 Ella Core: Unauthenticated AMF DoS via malformed InitialUEMessage with undersized integrity-protected NAS payload CVSS 3.1HIGH 7.5
TI-2026-26264 Ella Core has Privilege Escalation via Database Restore by NetworkManager role CVSS 3.1HIGH 7.2
TI-2026-25693 Ella Core panics on malformed NGAP Location Report CVSS 3.1HIGH 7.5
TI-2026-25692 Ella Core panics on invalid PDU Session IDs in NGAP messages CVSS 3.1HIGH 7.5
TI-2026-24848 Ella Core: AMF DoS via malformed PathSwitchRequest with empty NR security capability bitstrings CVSS 3.1HIGH 7.5
TI-2026-27005 Ella Core Panics Upon NGAP handover failure CVSS 3.1MEDIUM 6.5

See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences