CVE-2020-26155

Name: CVE-2020-26155
Creator: NVD / NIST
Published: 2021-03-18T17:15:13.353+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.36%

Last modified Jun 17, 2026

CVE-2020-26155 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.36% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.36%

28.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Utimaco	Block-Safe Firmware	2.0.0
Utimaco	Block-Safe Firmware	3.0.0
Utimaco	Cryptoserver Cp5 Firmware	5.0.0.0
Utimaco	Cryptoserver Cp5 Firmware	5.1.0.0
Utimaco	Cryptoserver Cp5 Vs-Nfd Firmware	5.1.0.0
Utimaco	Paymentserver Firmware	>= 3.0, <= 4.31.0
Utimaco	Paymentserver Hybrid Firmware	>= 3.0, <= 4.33.0
Utimaco	Securityserver Firmware	>= 3.0, <= 4.31.1

References

https://hsm.utimaco.com/products-hardware-security-modules/general-purpose-hsm/Exploit, Vendor Advisory
https://secureyourit.co.uk/wp/2021/03/13/utimaco-cve-2020-26155/Third Party Advisory
https://hsm.utimaco.com/products-hardware-security-modules/general-purpose-hsm/Exploit, Vendor Advisory
https://secureyourit.co.uk/wp/2021/03/13/utimaco-cve-2020-26155/Third Party Advisory

Timeline

Published: Mar 18, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-26155?

How severe is CVE-2020-26155?

CVE-2020-26155 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.36% probability of exploitation in the next 30 days.

How do I fix CVE-2020-26155?

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-2020-26155?

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

Scan your code now

Source: NVD / NIST