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CVE-2026-15720— Pre-auth heap out-of-bounds read in the AMF NAS 5GS mobile-identity handler

Quick assessment

Affected
open5gs open5gs
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Open5GS是Open5GS组织开源的一个 5G Core 和 Epc 的 C 语言开源实现,即 Lte/Nr 网络的核心网络。 Open5GS 2.7.7及之前版本存在缓冲区错误漏洞，该漏洞源于AMF NAS 5GS移动身份处理器中存在预认证堆越界读取，可能导致订阅者范围拒绝服务。

CVSS 8.6 · High EPSS 0.54% · P44

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
open5gs open5gs ≤ 2.7.7 affected
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I. Basic Information for CVE-2026-15720

Vulnerability Information
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Vulnerability Title
Pre-auth heap out-of-bounds read in the AMF NAS 5GS mobile-identity handler
Source: CVE Program / CVE List V5
Vulnerability Description
In Open5GS through version 2.7.7 a pre-authentication heap out-of-bounds read in the AMF NAS 5GS mobile-identity handler may result in subscriber-wide denial of service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Open5GS 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open5GS是Open5GS组织开源的一个 5G Core 和 Epc 的 C 语言开源实现,即 Lte/Nr 网络的核心网络。 Open5GS 2.7.7及之前版本存在缓冲区错误漏洞，该漏洞源于AMF NAS 5GS移动身份处理器中存在预认证堆越界读取，可能导致订阅者范围拒绝服务。
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
open5gs open5gs 0 ~ 2.7.7 -

II. Public POCs for CVE-2026-15720

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10943 chars
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Exploit chain & mitigation
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III. Intelligence Information for CVE-2026-15720

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Vendor Advisories for CVE-2026-15720 (1)

IV. Related Vulnerabilities

Same product: open5gs
Same vendor: open5gs
Same weakness: CWE-125

V. Comments for CVE-2026-15720

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