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CVE-2025-1731

Quick assessment

Affected
Zyxel USG FLEX H series uOS firmware
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.

Zyxel USG FLEX是中国合勤（Zyxel）公司的一款防火墙。提供灵活的 VPN 选项（IPsec、SSL 或 L2TP），为远程工作和管理提供灵活的安全远程访问。 Zyxel USG FLEX V1.32之前版本存在安全漏洞，该漏洞源于PostgreSQL命令权限分配不当，可能导致权限提升。

CVSS 7.8 · High EPSS 0.94% · P59

Public Exploits 1

ExploitDB · 1 EDB-52293 [local]
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I. Basic Information for CVE-2025-1731

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An incorrect permission assignment vulnerability in the PostgreSQL commands of the Zyxel USG FLEX H series uOS firmware versions from V1.20 through V1.31 could allow an authenticated local attacker with low privileges to gain access to the Linux shell and escalate their privileges by crafting malicious scripts or modifying system configurations with administrator-level access through a stolen token. Modifying the system configuration is only possible if the administrator has not logged out and the token remains valid.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键资源的不正确权限授予
Source: CVE Program / CVE List V5
Vulnerability Title
Zyxel USG FLEX 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zyxel USG FLEX是中国合勤（Zyxel）公司的一款防火墙。提供灵活的 VPN 选项（IPsec、SSL 或 L2TP），为远程工作和管理提供灵活的安全远程访问。 Zyxel USG FLEX V1.32之前版本存在安全漏洞，该漏洞源于PostgreSQL命令权限分配不当，可能导致权限提升。
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
Zyxel USG FLEX H series uOS firmware from V1.20 through V1.31 -

II. Public POCs for CVE-2025-1731

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III. Intelligence Information for CVE-2025-1731

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Other References for CVE-2025-1731 (1)

Same Patch Batch · Zyxel · 2025-04-22 · 3 CVEs total

CVE-2025-1732 6.7 MEDIUM Zyxel USG FLEX 安全漏洞
CVE-2025-3577 4.9 MEDIUM Zyxel AMG1302-T10B 安全漏洞

IV. Related Vulnerabilities

Same product: USG FLEX H series uOS firmware
Same vendor: Zyxel
Same weakness: CWE-732

V. Comments for CVE-2025-1731

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