How severe is CVE-2026-42275?

CVE-2026-42275 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-42275 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42275?

CVE-2026-42275 affects Netfoundry Zrok. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42275?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-42275 have an EU (EUVD) identifier?

Yes. CVE-2026-42275 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28511.

When was CVE-2026-42275 published?

CVE-2026-42275 was published on 2026-05-08 and last updated on 2026-06-17.

CVE-2026-42275

CVE-2026-42275 is a high-severity vulnerability in Netfoundry Zrok with a CVSS 3.x base score of 8.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 8.7)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28511
Weakness: CWE-22
Affected product: Netfoundry Zrok
Published: 2026-05-08
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-42275?: 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.
How severe is CVE-2026-42275?: CVE-2026-42275 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-42275 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42275?: CVE-2026-42275 affects Netfoundry Zrok. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42275?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-42275 have an EU (EUVD) identifier?: Yes. CVE-2026-42275 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28511.
When was CVE-2026-42275 published?: CVE-2026-42275 was published on 2026-05-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:netfoundry:zrok:*:*:*:*:*:*:*:*

More vulnerabilities in Netfoundry Zrok

CVE-2026-40303 — High (CVSS 7.5): zrok is software for sharing web services, files, and network resources. Prior to version 2.0.1,…
CVE-2026-40302 — Medium (CVSS 6.1): zrok is software for sharing web services, files, and network resources. Prior to version 2.0.1, the proxyUi template…
CVE-2026-40304 — Medium (CVSS 5.3): zrok is software for sharing web services, files, and network resources. Prior to version 2.0.1, the unaccess handler…

All CVEs affecting Netfoundry Zrok →

Other CWE-22 (Path Traversal) vulnerabilities

CVE-2026-48282 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Limitation of a Pathname to a Restricted…
CVE-2026-54917 — Critical (CVSS 10.0): SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables. Prior to 4.30, the…
CVE-2026-11429 — Critical (CVSS 10.0): Two endpoints in the Vault Service ScriptsController, shared by Altium Enterprise Server and Altium 365, accept file…
CVE-2026-34909 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to…
CVE-2026-7411 — Critical (CVSS 10.0): In Eclipse BaSyx Java Server SDK versions prior to 2.0.0-milestone-10, inadequate path normalization in the Submodel…
CVE-2026-36767 — Critical (CVSS 10.0): A path traversal vulnerability in the /content/images/add endpoint of shopizer v3.2.5 allows attackers write arbitrary…

Browse all CWE-22 (Path Traversal) vulnerabilities →