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CVE-2026-2522— Open5GS MME esm-build.c memory corruption

Quick assessment

Affected
n/a Open5GS
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.

Open5GS是Open5GS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 2.7.6及之前版本存在安全漏洞，该漏洞源于对组件MME中文件/src/mme/esm-build.c的错误操作，可能导致内存损坏。

CVSS 5.3 · Medium EPSS 0.55% · P44
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I. Basic Information for CVE-2026-2522

Vulnerability Information
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Vulnerability Title
Open5GS MME esm-build.c memory corruption
Source: CVE Program / CVE List V5
Vulnerability Description
A security vulnerability has been detected in Open5GS up to 2.7.6. Impacted is an unknown function of the file /src/mme/esm-build.c of the component MME. The manipulation leads to memory corruption. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
内存缓冲区边界内操作的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Open5GS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open5GS是Open5GS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 2.7.6及之前版本存在安全漏洞，该漏洞源于对组件MME中文件/src/mme/esm-build.c的错误操作，可能导致内存损坏。
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 2.7.0 cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-2522

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III. Intelligence Information for CVE-2026-2522

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News Coverage for CVE-2026-2522 (1)

Other References for CVE-2026-2522 (1)

Same Patch Batch · n/a · 2026-02-15 · 3 CVEs total

CVE-2026-2521 5.3 MEDIUM Open5GS SGW-C sgwc_s5c_handle_create_session_response memory corruption
CVE-2026-2517 5.3 MEDIUM Open5GS SMF types.c ogs_gtp2_parse_tft denial of service

IV. Related Vulnerabilities

Same product: Open5GS
Same vendor: n/a
Same weakness: CWE-119

V. Comments for CVE-2026-2522

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