Buffalo TeraStation TS5400R Excessive File Permissions Information Disclosure
Priority LOW 31CWE-732Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00545 45th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| BUFFALO INC. | TeraStation NAS TS5400R | up to 4.02-0.06 | — | No fix listed | CNA |
- TeraStation NAS TS5400R VendorBUFFALO INC. Affected up to 4.02-0.06 Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:buffaloamericas:terastation_nas_ts5400r_firmware:*:*:*:*:*:*:*:* | up to 4.02-0.06 | Vulnerable | Buffaloamericas |
| cpe:2.3:h:buffaloamericas:terastation_nas_ts5400r:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Buffaloamericas |
- cpe:2.3:o:buffaloamericas:terastation_nas_ts5400r_firmware:*:*:*:*:*:*:*:* Versions up to 4.02-0.06 Vulnerable ·Buffaloamericas
- cpe:2.3:h:buffaloamericas:terastation_nas_ts5400r:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Buffaloamericas
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-29516
- 2026-10-03 Alias added: GHSA-p4fh-pgj9-w5xq
- 2026-10-21 EPSS moved to the 50th–90th percentile
- 2026-10-25 EPSS moved to the below the 50th percentile
References
Other 1
More BUFFALO INC. vulnerabilities
- TI-2021-03393 Path traversal in Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3 KEVCVSS 3.1CRITICAL 9.8
- TI-2023-27920 An issue in Buffalo LS210D v.1.78-0.03 allows a remote attacker to execute arbitrary code… CVSS 3.1HIGH 8.1
- TI-2023-20705 An Issue in Buffalo America, Inc. CVSS 3.1HIGH 7.5
- TI-2023-26723 Command injection in the ping utility on Buffalo LS210D 1.78-0.03 allows a remote… CVSS 3.1HIGH 7.2
- TI-2018-09572 Incorrect access control in nasapi in Buffalo TS5600D1206 version 3.61-0.10 allows… CVSS 3.0CRITICAL 9.8
- TI-2024-15530 Plaintext storage of a password issue exists in BUFFALO wireless LAN routers, which may… CVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-29516 · CVE Program
- CVE-2026-29516 · NVD
- FIRST EPSS
- GHSA-p4fh-pgj9-w5xq · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences