CVE-2026-34184

CRITICAL

Missing Authorization in Hydrosystem Control System

Title source: cna

Description

Hydrosystem Control System does not enforce authorization for some directories. This allows an unauthorized attacker to read all files in these directories and even execute some of them. Critically the attacker could run PHP scripts directly on the connected database.This issue was fixed in Hydrosystem Control System version 9.8.5

References (2)

[Third Party Advisory] https://cert.pl/posts/2026/04/CVE-2026-4901/

[Product] https://www.hydrosystem.poznan.pl/

Scores

CVSS v3 9.1

EPSS 0.0004

EPSS Percentile 12.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Details

CWE

CWE-862

Status published

Products (2)

Hydrosystem/Control System < 9.8.5

hydrosystem.poznan/control_system < 9.8.5

Published Apr 09, 2026

Tracked Since Apr 09, 2026