CVE-2026-47116
Received Received - Intake

Hard-Coded Credentials in LTK3500SF Firmware

Publication date: 2026-09-22

Last updated on: 2026-09-22

Assigner: VulnCheck

Description
LTSecurity LTK3500SF contains a hard-coded credentials vulnerability where root and guest account passwords are stored as reversible hashes in /etc/shadow, recoverable using dictionary-based cracking tools. Attackers can use the recovered credentials to authenticate via Telnet or SSH and obtain full root-level access to the operating system.

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Meta Information

Published
2026-09-22
Last Modified
2026-09-22
Generated
2026-09-23
AI Q&A
2026-09-22
EPSS Evaluated
N/A
NVD
CVE-2026-47116
EUVD
EUVD-2026-84683

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
ltsecurity ltk3500sf ac3f_v1.1.0_build191121
ltsecurity ltk3500sf *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-798 The product contains hard-coded credentials, such as a password or cryptographic key.

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Executive Summary

LTSecurity LTK3500SF has a hard-coded credentials vulnerability where root and guest account passwords are stored as reversible hashes in /etc/shadow. Attackers can crack these hashes using dictionary-based tools to recover the passwords and gain full root-level access via Telnet or SSH.

Detection Guidance

Check if the device is running affected firmware versions LTK3500SF <= AC3F_V1.1.0_build191121. Inspect /etc/shadow for MD5 hashes of root and guest accounts. Use commands like 'cat /etc/shadow' to view hashes. Test credentials via Telnet or SSH with common passwords like '12345'.

Impact Analysis

An attacker could exploit this to gain full administrative control over the device, potentially leading to data theft, unauthorized system modifications, or further network compromise. The vulnerability allows remote access via Telnet or SSH without requiring user interaction.

Compliance Impact

This vulnerability likely violates compliance requirements for data protection and access control, such as GDPR's security principles or HIPAA's safeguards for protected health information. Unauthorized access risks data breaches, leading to potential legal and regulatory penalties.

Mitigation Strategies

Update firmware to a patched version if available. Disable Telnet and SSH access if not required. Change default passwords for root and guest accounts to strong, unique values. Restrict network access to the device via firewalls.

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