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CVE-2026-44474— Ella Core: Handover failures during concurrent Security Mode Command

Quick assessment

Affected
ellanetworks core
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Ella Core是Ella Networks开源的一个用于私有网络的5G核心网解决方案。 Ella Core 1.10.0之前版本存在安全特征问题漏洞，该漏洞源于未强制执行TS 33.501 §6.9.5.1中定义的安全程序并发运行规则，可能在N2切换待处理时发送NAS安全模式命令，导致UE与目标gNB之间的KgNB不匹配，造成切换失败。

CVSS 3.7 · Low EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不恰当实现的标准安全检查
Source: CVE Program / CVE List V5
Vulnerability Title
Ella Core 安全特征问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ella Core是Ella Networks开源的一个用于私有网络的5G核心网解决方案。 Ella Core 1.10.0之前版本存在安全特征问题漏洞，该漏洞源于未强制执行TS 33.501 §6.9.5.1中定义的安全程序并发运行规则，可能在N2切换待处理时发送NAS安全模式命令，导致UE与目标gNB之间的KgNB不匹配，造成切换失败。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ellanetworks core < 1.10.0 -

II. Public POCs for CVE-2026-44474

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III. Intelligence Information for CVE-2026-44474

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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
Same vendor: ellanetworks
Same weakness: CWE-358

V. Comments for CVE-2026-44474

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