What’s Vulnerable › Vulnerabilities

CVE-2026-102141: Kiteworks Core Privilege Escalation through External Control of File Name or Path

• Severity: medium (CVSS 6.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-30 · updated 2026-10-07
• Weakness: CWE-73

Description

Two Kiteworks Core cluster-management operations did not validate file paths supplied to them, so an attacker holding root on one node of a cluster could write files as root onto another node and cause them to be executed there. Exploitation requires backend root access on a cluster node and a pending software patch present on the target node.

Affected products

• Kiteworks Email Protection Gateway: before 9.5.1 — fixed in 9.5.1

How to fix

Upgrade to a fixed version: Kiteworks Email Protection Gateway 9.5.1. Check the vendor advisory for mitigations.

References

• https://github.com/kiteworks/security-advisories/security/advisories/GHSA-m39v-w8fv-gf3m
• https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-274-01.json

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