CVE-2026-4901

Name: CVE-2026-4901
Creator: NVD / NIST
Published: 2026-04-09T10:16:22.543+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.9/10EPSS 0.26%

Last modified Jun 17, 2026

CVE-2026-4901 is a medium-severity vulnerability rated 6.9/10 on the CVSS scale. 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. EPSS estimates a 0.26% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

6.5/10

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

CVSS 4.0

6.9/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.26%

17.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-532

Affected Software

Vendor	Product	Versions
Hydrosystem.Poznan	Control System	< 9.8.5

References

https://cert.pl/posts/2026/04/CVE-2026-4901/Vendor Advisory
https://www.hydrosystem.poznan.pl/Product

Timeline

Published: Apr 9, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-4901?

How severe is CVE-2026-4901?

CVE-2026-4901 has a CVSS score of 6.9/10 (MEDIUM severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.

How do I fix CVE-2026-4901?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-4901?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST