CVE-2025-59095

Hard-coded Key for PIN Encryption in dormakaba Kaba exos 9300

Published Jan 26, 2026 CVSS 4.0 · 6.8 Medium EPSS < 1% KEV · Not listed
Description
The program libraries (DLL) and binaries used by exos 9300 contain multiple hard-coded secrets. One notable example is the function "EncryptAndDecrypt" in the library Kaba.EXOS.common.dll. This algorithm uses a simple XOR encryption technique combined with a cryptographic key (cryptoKey) to transform each character of the input string. However, it's important to note that this implementation does not provide strong encryption and should not be considered secure for sensitive data. It's more of a custom encryption approach rather than a common algorithm used in cryptographic applications. The key itself is static and based on the founder's name of the company. The functionality is for example used to encrypt the user PINs before storing them in the MSSQL database.

Remediation

Vendor Solution

An update to the latest version of exos is recommended, at least exos 4.3.3.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Dormakaba
Dormakaba kaba Exos 9300
Vendors & Products Dormakaba
Dormakaba kaba Exos 9300
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description The program libraries (DLL) and binaries used by exos 9300 contain multiple hard-coded secrets. One notable example is the function "EncryptAndDecrypt" in the library Kaba.EXOS.common.dll. This algorithm uses a simple XOR encryption technique combined with a cryptographic key (cryptoKey) to transform each character of the input string. However, it's important to note that this implementation does not provide strong encryption and should not be considered secure for sensitive data. It's more of a custom encryption approach rather than a common algorithm used in cryptographic applications. The key itself is static and based on the founder's name of the company. The functionality is for example used to encrypt the user PINs before storing them in the MSSQL database.
Title Hard-coded Key for PIN Encryption in dormakaba Kaba exos 9300
Weaknesses CWE-798
References
Metrics cvssV4_0

{'score': 6.8, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
SEC-VLab
Published
Updated
Jan 26, 2026, 5:16 PM
Reserved
Sep 9, 2025, 7:52 AM
Status
Deferred
Published
Jan 26, 2026, 10:16 AM
Modified
Jun 17, 2026, 9:45 AM