ZDI 2026-10-15

ZDI-26-776: QNAP TS-453E syslog log_message Format String Remote Code Execution Vulnerability

Machine-generated analysis · WAYSCloud LLM

Unauthenticated remote code execution via a syslog format-string flaw on QNAP TS-453E devices.

Context

The advisory concerns QNAP TS-453E devices. It describes a format-string vulnerability in the syslog log_message handling that permits remote code execution. The advisory notes that exploitation is possible for network-adjacent attackers.

Operator considerations

Check: inventory QNAP TS-453E devices and verify the syslog service is enabled.
Isolate: place affected devices on a segregated network until a fix is applied.

From Zero Day Initiative ↗

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of QNAP TS-453E devices. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.5. The following CVEs are assigned: CVE-2018-10388, CVE-2018-10389.

Read the full advisory on ZDI →

Related advisories