CVE-2026-33281— Ella Core panics on invalid PDU Session IDs in NGAP messages
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 1.6.0之前版本存在输入验证错误漏洞，该漏洞源于处理具有无效PDU会话ID的NGAP消息时发生内核崩溃，可能导致服务中断。
Possible ATT&CK Techniques 2 AI
T1190 · Exploit Public-Facing Application T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-33281
Vulnerability Information
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Vulnerability Title
Ella Core panics on invalid PDU Session IDs in NGAP messages
Source: CVE Program / CVE List V5
Vulnerability Description
Ella Core is a 5G core designed for private networks. Versions prior to 1.6.0 panic when processing NGAP messages with invalid PDU Session IDs outside of 1-15. An attacker able to send crafted NGAP messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required. Version 1.6.0 added PDU Session ID validations during NGAP message handling.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对数组索引的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Ella Core 输入验证错误漏洞
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 1.6.0之前版本存在输入验证错误漏洞，该漏洞源于处理具有无效PDU会话ID的NGAP消息时发生内核崩溃，可能导致服务中断。
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 | < 1.6.0 | - |
|
II. Public POCs for CVE-2026-33281
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-33281 (1)
Same Patch Batch · ellanetworks · 2026-03-23 · 3 CVEs total
| CVE-2026-33282 | 7.5 HIGH | Ella Core panics on malformed NGAP Location Report |
| CVE-2026-33283 | 6.5 MEDIUM | Ella Core panics on malformed ULNASTransport Message without a Request Type |
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V. Comments for CVE-2026-33281
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