CVE-2026-42275

High

Published: 08 May 2026

Published

08 May 2026

Modified

08 May 2026

KEV Added

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Patch

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CVSS Score v3.1 8.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

EPSS Score 0.0033 24.8th percentile

Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-42275 is a high-severity Path Traversal (CWE-22) vulnerability in Netfoundry Zrok. Its CVSS base score is 8.7 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 24.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-28511

Vulnerability details

zrok is software for sharing web services, files, and network resources. Prior to version 2.0.2, the zrok WebDAV drive backend (davServer.Dir) restricts path traversal through lexical normalization but does not prevent symlink following. When a symbolic link inside the shared…

DriveRoot points to a location outside that root, remote WebDAV consumers can read files and—on shares without OS-level permission restrictions—write or overwrite files anywhere on the host filesystem accessible to the zrok process. This issue has been patched in version 2.0.2.

CWE(s): CWE-22 CWE-61

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1005 Data from Local System Collection

Adversaries may search local system sources, such as file systems, configuration files, local databases, virtual machine files, or process memory, to find files of interest and sensitive data prior to Exfiltration.

attack.mitre.org →

T1039 Data from Network Shared Drive Collection

Adversaries may search network shares on computers they have compromised to find files of interest.

attack.mitre.org →

Why these techniques?

Path traversal via symlink following in exposed WebDAV backend directly enables remote exploitation of a public-facing service (T1190) to read arbitrary host files (T1005) and access data from the shared drive (T1039).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0