CVE-2026-25607: Weak password encoding in STER

Severity: medium (CVSS 5.7 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-22 · updated 2026-07-23
Weakness: CWE-261

Description

Use of a weak password encoding algorithm in STER software allows the value of the password to be guessed after analyzing how passwords with known values are encoded. This issue was fixed in version 9.5.

Affected products

Centralny Instytut Ochrony Pracy - Państwowy Instytut Badawczy STER: before 9.5 — fixed in 9.5

How to fix

Upgrade to a fixed version: Centralny Instytut Ochrony Pracy - Państwowy Instytut Badawczy STER 9.5. Check the vendor advisory for mitigations.

References

https://cert.pl/posts/2026/05/CVE-2026-25606
https://www.ciop.pl/CIOPPortalWAR/appmanager/ciop/pl?_nfpb=true&_pageLabel=P52000165211572544981480

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