CVE-2026-29516: Buffaloamericas Terastation NAS TS5400R Firmware

Medium severity, CVSS 4.9. EPSS: 0.6% chance of exploitation in the next 30 days.

Buffalo TeraStation NAS TS5400R firmware version 4.02-0.06 and prior contain an excessive file permissions vulnerability that allows authenticated attackers to read the /etc/shadow file by uploading and executing a PHP file through the webserver. Attackers can exploit world-readable permissions on /etc/shadow to retrieve hashed passwords for all configured accounts including root.

Affected products

• Buffaloamericas Terastation NAS TS5400R Firmware: up to and including 4.02-0.06

Published 2026-03-16. Last modified 2026-06-17.