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CVE-2026-44473

Ella Core: UE Downlink Redirection via Forged PDUSessionResourceSetupResponse

Published: May 27, 2026Updated: May 27, 2026 Sources: CVE List NVD
NVD MITRE
7.1CVSS
HIGH

Ella Core is a 5G core designed for private networks. Prior to 1.10.0, a radio with a valid NG Setup can send a forged PDUSessionResourceSetupResponse carrying any UE's AMF-UE-NGAP-ID. Ella Core does not verify the message arrived on the SCTP association bound to that UE's logical NG-connection, then creates a GTP tunnel towards that radio. This vulnerability is fixed in 1.10.0.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:AAC:LPR:NUI:NS:UC:LI:NA:H
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:HAvailability
High

Weaknesses

CWE-358CWE-863

Affected Products

core
ellanetworks

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://github.com/ellanetworks/core/security/advisories/GHSA-qfxw-v8qx-vj3v
github.com

Timeline

Published
May 27, 2026
Last Updated
May 27, 2026

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