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CVE-2025-69253— free5GC vulnerable to improper error handling in NEF with information exposure

Quick assessment

Affected
free5gc udr
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.

free5GC是free5GC开源的一个第 5 代 (5G) 移动核心网络的开源项目。 free5GC 1.4.1及之前版本存在安全漏洞，该漏洞源于用户数据存储库存在错误处理不当和信息泄露，NEF组件可靠地向远程客户端泄露内部解析错误细节，可能有助于攻击者进行服务指纹识别。

AI Predicted 5.3 Difficulty: Trivial EPSS 0.35% · P28

Possible ATT&CK Techniques 1 AI

T1592.004 · Client Configurations
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I. Basic Information for CVE-2025-69253

Vulnerability Information
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Vulnerability Title
free5GC vulnerable to improper error handling in NEF with information exposure
Source: CVE Program / CVE List V5
Vulnerability Description
free5GC is an open-source project for 5th generation (5G) mobile core networks. Versions up to and including 1.4.1 of the User Data Repository are affected by Improper Error Handling with Information Exposure. The NEF component reliably leaks internal parsing error details (e.g., invalid character 'n' after top-level value) to remote clients, which can aid attackers in service fingerprinting. All deployments of free5GC using the Nnef_PfdManagement service may be vulnerable. free5gc/udr pull request 56 contains a patch. No direct workaround is available at the application level. Applying the official patch is recommended.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
Source: CVE Program / CVE List V5
Vulnerability Type
通过错误消息导致的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
free5GC 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
free5GC是free5GC开源的一个第 5 代 (5G) 移动核心网络的开源项目。 free5GC 1.4.1及之前版本存在安全漏洞，该漏洞源于用户数据存储库存在错误处理不当和信息泄露，NEF组件可靠地向远程客户端泄露内部解析错误细节，可能有助于攻击者进行服务指纹识别。
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
free5gc udr <= 1.4.1 -

II. Public POCs for CVE-2025-69253

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III. Intelligence Information for CVE-2025-69253

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Patches & Fixes for CVE-2025-69253 (1)

News Coverage for CVE-2025-69253 (1)

Same Patch Batch · free5gc · 2026-02-24 · 6 CVEs total

CVE-2026-26025 free5GC SMF crash (nil pointer dereference) on PFCP SessionReportRequest when ReportType.U
CVE-2026-26024 free5GC SMF crash (nil pointer dereference) on PFCP SessionReportRequest when ReportType.U
CVE-2026-25501 free5GC SMF crash (nil pointer dereference) on PFCP SessionReportRequest when ReportType.D
CVE-2026-27642 free5GC has Improper Input Validation in UDM UEAU Service
CVE-2026-27643 free5GC has improper error handling in NEF with information exposure

IV. Related Vulnerabilities

Same product: udr
Same vendor: free5gc
Same weakness: CWE-209

V. Comments for CVE-2025-69253

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