CVE-2026-44474— Ella Core: Handover failures during concurrent Security Mode Command
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| ellanetworks | core | < 1.10.0 | affected |
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I. Basic Information for CVE-2026-44474
Vulnerability Information
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Vulnerability Title
Ella Core: Handover failures during concurrent Security Mode Command
Source: NVD (National Vulnerability Database)
Vulnerability Description
Ella Core is a 5G core designed for private networks. Prior to 1.10.0, Ella Core didn't enforce security rules on concurrent running of security procedures defined in TS 33.501 §6.9.5.1 — it could send a NAS Security Mode Command while an N2 handover was still pending (and vice versa). Concurrent Security Mode Command and N2 handover produce a KgNB mismatch between the UE and target gNB, causing the handover to fail. Requires a stalled gNB + re-registration race to trigger. This vulnerability is fixed in 1.10.0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
不恰当实现的标准安全检查
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| ellanetworks | core | < 1.10.0 | - |
II. Public POCs for CVE-2026-44474
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-44474 (1)
Same Patch Batch · ellanetworks · 2026-05-27 · 3 CVEs total
| CVE-2026-44473 | 7.1 HIGH | Ella Core: UE Downlink Redirection via Forged PDUSessionResourceSetupResponse |
| CVE-2026-44475 | 6.1 MEDIUM | Ella Core: UE Security Capability bypass on NGAP PathSwitchRequest |
IV. Related Vulnerabilities
Same product: core
- CVE-2026-44473
Ella Core: UE Downlink Redirection via Forged PDUSessionReso - CVE-2026-44475
Ella Core: UE Security Capability bypass on NGAP PathSwitchR - CVE-2026-45158
OPNsense: Command Injection via Attacker-Controlled DHCP Con - CVE-2026-44194
OPNsense: RCE on user managment - CVE-2026-44195
OPNsense: Authentication lockout bypass
Same vendor: ellanetworks
- CVE-2026-44473
Ella Core: UE Downlink Redirection via Forged PDUSessionReso - CVE-2026-44475
Ella Core: UE Security Capability bypass on NGAP PathSwitchR - CVE-2026-34762
Ella Core Has Audit Log Falsification via Path/Body IMSI Mis - CVE-2026-34761
Ella Core Panics Upon NGAP handover failure - CVE-2026-33907
Ella Core Panics during NAS Authentication Response/Failure
Same weakness: CWE-358
- CVE-2026-42081
free5GC: UE Security Capability bypass on NGAP PathSwitchReq - CVE-2026-42082
free5GC: Missing Concurrent NAS SMC Validation During NGAP H - CVE-2026-44473
Ella Core: UE Downlink Redirection via Forged PDUSessionReso - CVE-2026-44475
Ella Core: UE Security Capability bypass on NGAP PathSwitchR - CVE-2025-31983
HCL BigFix Service Management (SM) is affected by a security
V. Comments for CVE-2026-44474
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