CVE-2026-34184

EUVD-2026-20884
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
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.1 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 14%
Affected Products (NVD)
VendorProductVersion
hydrosystem.poznancontrol_system
𝑥
< 9.8.5
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://cert.pl/posts/2026/04/CVE-2026-4901/
https://www.hydrosystem.poznan.pl/