CVE-2026-29516

Buffalo TeraStation TS5400R Excessive File Permissions Information Disclosure

State: Published
Severity: 6.9 Medium
Published: Mar 16, 2026
Updated: May 11, 2026
Reserved: Mar 4, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	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	VulnCheck
3.1	4.9 Medium	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N	VulnCheck

Weaknesses

CWE-732 Incorrect Permission Assignment for Critical Resource

Affected Products

Product	Versions
TeraStation NAS TS5400RBuffalo	4.02-0.06 and earlierAffected

References

https://buffaloamericas.com/product
https://www.vulncheck.com/advisories/buffalo-terastation-ts5400r-excessive-file-permissions-information-disclosurethird-party-advisory

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