CVE intelligence and bounded remediation

CVE-2020-26155 — Multiple files and folders in Utimaco SecurityServer 4.20.0.4 and 4.31.1.0

High CVSS 7.8

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.

Severity
High
CVSS
7.8 (3.1)
Published
2021-03-18
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-427, CWE-732

Affected products

  • 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

Showing 6 representative product identities from 8 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Privilege escalation and unsafe privilege management

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Check exposure

  • Map service accounts, operating-system identities, roles, capabilities, impersonation, set-user transitions, and administrative helper paths.
  • Determine whether untrusted users or lower-privilege processes can reach the affected transition or modify inputs it trusts.
  • Review file, socket, registry, device, job, container, and cloud-role permissions used before and after privilege changes.

Remediate safely

  • Apply the supported fix and redesign privileged operations as a minimal, authenticated, allowlisted interface.
  • Drop privileges before processing untrusted input, verify the drop succeeds, and remove unnecessary roles, capabilities, and write permissions.
  • Validate ownership and permissions at time of use and add explicit lower-to-higher privilege boundary tests.

Authoritative sources

Complete CVE record and remediation plan

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