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Medium

Weak password encoding in STER software

IdentifiersCVE-2026-25607CWE-261· Weak Encoding for Password

CVE-2026-25607 is a vulnerability in STER software from Centralny Instytut Ochrony Pracy - Państwowy Instytut Badawczy affecting versions prior to 9.5. The issue stems from use of a weak password encoding algorithm. According to the provided content, an attacker can analyze how passwords with known values are encoded and use that information to guess the value of other passwords. This is a password protection weakness rather than a memory corruption or injection flaw, and it undermines the confidentiality of stored or processed password material.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can allow an attacker to recover or reliably guess user password values from their encoded representations. This can lead to unauthorized account access and compromise of data or functionality available to those accounts. The weakness reduces the effective secrecy of passwords and may facilitate broader credential compromise if encoded password values are exposed to an attacker.

Mitigation

If you can’t patch tonight, do this now.

If immediate upgrade is not possible, limit access to any stored or transmitted encoded password material, restrict access to systems and interfaces where such values can be observed, and monitor for unauthorized access attempts. Because the weakness is inherent to the encoding algorithm, the primary effective mitigation is to deploy the fixed version.

Remediation

Patch, then assume compromise.

Upgrade STER to version 9.5 or later. The provided content states that this issue was fixed in version 9.5.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
SterSterapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

2 SOURCESView more in app
What this page doesn’t show

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity1

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-25607
NVD
nvd.nist.gov/vuln/detail/CVE-2026-25607
MITRE CWE · CWE-261
Weak Encoding for Password
cert.pl
cert.pl/posts/2026/05/CVE-2026-25606
ciop.pl
ciop.pl/CIOPPortalWAR/appmanager/ciop/pl?_nfpb=true&_pageLabel=P52000165211572544981480