CVE-2026-29516 MEDIUM

CVE-2026-29516: Buffalo TeraStation TS5400R Excessive File Permissions Information Disclosure

Vendor Buffalo
Product TeraStation NAS TS5400R
Weakness CWE-732
Published March 16, 2026
Last update May 11, 2026
View on NVD All CVEs

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 16, 2026 CVE published
May 11, 2026 Record updated