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Vulnerability record · CVE-2026-47116 · published 22 September 2026

CVE-2026-47116: Hard-coded credentials vulnerability

LTSecurity LTK3500SF contains a hard-coded credentials vulnerability where the root and guest account passwords are stored in /etc/shadow as weak hashes recoverable with dictionary-based cracking tools. The recovered credentials authenticate against the device's Telnet and SSH services and grant root-level access to the operating system. These services are not confirmed to start automatically at boot, so exploitation requires Telnet or SSH to be running, whether enabled by the device configuration or started manually.

9.2 CVSS 4.0 Critical EPSS 0.51% · top 58.7% CWE-798 · Hard-coded credentials Deferred
9.2CVSS 4.0 base score
0.51%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
24 Sep 2026Last modified by NVD

Description

LTSecurity LTK3500SF contains a hard-coded credentials vulnerability where the root and guest account passwords are stored in /etc/shadow as weak hashes recoverable with dictionary-based cracking tools. The recovered credentials authenticate against the device's Telnet and SSH services and grant root-level access to the operating system. These services are not confirmed to start automatically at boot, so exploitation requires Telnet or SSH to be running, whether enabled by the device configuration or started manually.

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/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:

References

LinkTags
https://github.com/AndreaLandriscina/Hardcoded-Credentials-in-LTSecurity-LTK3500SF
https://www.vulncheck.com/advisories/ltsecurity-ltk3500sf-hard-coded-credentials-via-telnet-ssh

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Source: NIST National Vulnerability Database (record CVE-2026-47116), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.