MeWare PDKS EUVD-2026-26371

Organizations running affected PDKS versions should immediately upgrade to version VMYR_3.5.2025117 or later, which addresses the authorization bypass vulnerability according to the version advisory data. Consult the TR-CERT advisory at https://www.usom.gov.tr/bildirim/tr-26-0141 for vendor-specific upgrade instructions and potential prerequisites. Until patching is completed, implement interim compensating controls: restrict PDKS network access to trusted IP ranges or VPN-only connections to reduce attack surface; enable comprehensive audit logging of all authorization decisions and privilege escalations to detect abuse attempts; review and minimize user privilege assignments following least-privilege principles, particularly for accounts that can access personnel or sensitive HR data; implement application-layer monitoring to detect anomalous access patterns such as low-privileged users accessing administrative functions or lateral movement across user contexts. Note that restricting network access reduces but does not eliminate risk from authenticated insiders. These workarounds should be considered temporary measures only, as the underlying authorization flaw remains exploitable by any authenticated user until patched.