CVE-2025-1731
highpriority · track · 10EPSS 0.009 · 61 %ileexploit · PoCDEEURUUSEPSS · scored 2026-10-23
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
exploits (1)
Public proof-of-concept and weaponised exploit code.
- EDB-52293Zyxel USG FLEX H series uOS 1.31 - Privilege EscalationPoC · exploit_db
affected products (5)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2025-0855Zyxel Firewall: Mehrere Schwachstellen ermöglichen PrivilegieneskalationDeutsch2025-04-21csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen in Zyxel Firewall ausnutzen, um seine Privilegien zu erhöhen.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (6)
External citations — patches, advisories, analysis.
- http://seclists.org/fulldisclosure/2025/Apr/27cnnvd
- https://www.exploit-db.com/exploits/52293cnnvd
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-incorrect-permission-assignment-and-improper-privilege-management-vulnerabilities-in-usg-flex-h-series-firewalls-04-22-2025cnnvd
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-incorrect-permission-assignment-and-improper-privilege-management-vulnerabilities-in-usg-flex-h-series-firewalls-04-22-2025enisa_euvd
- http://seclists.org/fulldisclosure/2025/Apr/27Mailing Listnvd
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-incorrect-permission-assignment-and-improper-privilege-management-vulnerabilities-in-usg-flex-h-series-firewalls-04-22-2025Vendor Advisorynvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan