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CVE

CVE-2026-4901

Hydrosystem Control System saves sensitive information into a log file. Critically, user credentials are logged allowing

Hydrosystem Control System saves sensitive information into a log file. Critically, user credentials are logged allowing the attacker to obtain further authorized access into the system. Combined with vulnerability CVE-2026-34184, these sensitive information could be accessed by an unauthorized user.This issue was fixed in Hydrosystem Control System version 9.8.5.

MEDIUM · CVSS 6.5 EPSS 0.00038
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  • SSVC automatable: yes - attacks can be scripted at scale
Sigma rules0 YARA rules0
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Weakness Classification

CWE-532Insertion of Sensitive Information into Log File
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Affected Products & Versions

1
hydrosystem.poznan control system< 9.8.5
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Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · cvd@cert.pl
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Apr 2026 · 10:16 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://cert.pl/posts/2026/04/CVE-2026-4901/Vendor Advisory
https://www.hydrosystem.poznan.pl/Product
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