Password-hash disclosure via world-readable shadow file
Published Mar 16, 2026 · Updated Mar 16, 2026
Information disclosure in BUFFALO TeraStation TS5400R 4.02-0.06 and earlier lets remote authenticated users read /etc/shadow. The webserver executes an uploaded PHP file that reads /etc/shadow because the firmware makes that critical file world-readable. Administrative web access is required, and disclosure exposes password hashes for every configured account, including root, without altering data or interrupting service.
Summary
What happened
Information disclosure in BUFFALO TeraStation TS5400R 4.02-0.06 and earlier lets remote authenticated users read /etc/shadow. The webserver executes an uploaded PHP file that reads /etc/shadow because the firmware makes that critical file world-readable. Administrative web access is required, and disclosure exposes password hashes for every configured account, including root, without altering data or interrupting service.
The record
- CVE
- CVE-2026-29516
- Published
- Mar 16, 2026
- Updated
- Mar 16, 2026
- Vendor
- BUFFALO INC.
- Product
- TeraStation TS5400R
- Classifications
- CWE-732, T1003.008
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Mar 16, 2026CVE publishedPublication date reported by the CVE source.
- Mar 16, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=4.02-0.06
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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