Medium severity4.9NVD Advisory· Published Mar 16, 2026· Updated May 14, 2026

CVE-2026-29516

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.

Affected products

Buffalo/TeraStation NAS TS5400Rv5
Range: 0
Buffaloamericas/Terastation Nas Ts5400r Firmware
cpe:2.3:o:buffaloamericas:terastation_nas_ts5400r_firmware:*:*:*:*:*:*:*:*
Range: <=4.02-0.06

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

www.vulncheck.com/advisories/buffalo-terastation-ts5400r-excessive-file-permissions-information-disclosurenvdThird Party Advisory
buffaloamericas.comnvdProduct

News mentions

No linked articles in our index yet.

Severity

MediumCVSS v3.1

4.9/ 10

CVSS v46.9

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack vector: Network
Complexity: Low
Privileges: High
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

EPSS

Probability of exploitation in the next 30 days.

0.01%

VYPR risk score

Composite of severity, exploitation, and reach.

0.32medium

cvss	0.319
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000

Weaknesses

CWE-732
Incorrect Permission Assignment for Critical Resource

CVE ID

CVE-2026-29516

Credits

OC
Omar Crespo, Pentester, GM Sectec, Corp.
finder
VA
Victor A. Morales, Senior Pentester Team Leader, GM Sectec, Corp
finder
V
VulnCheck
coordinator