What’s Vulnerable › Vulnerabilities

CVE-2020-26155

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-03-18 · updated 2026-06-17
• Weakness: CWE-427

Description

Multiple files and folders in Utimaco SecurityServer 4.20.0.4 and 4.31.1.0. are installed with Read/Write permissions for authenticated users, which allows for binaries to be manipulated by non-administrator users. Additionally, entries are made to the PATH environment variable which, in conjunction with these weak permissions, could enable an attacker to perform a DLL hijacking attack.

Affected products

• Utimaco Block-Safe Firmware: 2.0.0, 3.0.0
• Utimaco Cryptoserver Cp5 Firmware: 5.0.0.0, 5.1.0.0
• Utimaco Cryptoserver Cp5 Vs-Nfd Firmware: 5.1.0.0
• Utimaco Paymentserver Firmware: from 3.0 through 4.31.0
• Utimaco Paymentserver Hybrid Firmware: from 3.0 through 4.33.0
• Utimaco Securityserver Firmware: from 3.0 through 4.31.1

References

• https://hsm.utimaco.com/products-hardware-security-modules/general-purpose-hsm/
• https://secureyourit.co.uk/wp/2021/03/13/utimaco-cve-2020-26155/
• https://hsm.utimaco.com/products-hardware-security-modules/general-purpose-hsm/
• https://secureyourit.co.uk/wp/2021/03/13/utimaco-cve-2020-26155/

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