Improper Authentication (CWE-287) in the PAM configuration in Loytec LIP-ME201C, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD through 8.4.16 on LINX-A64 allows a local attacker to authenticate as a uid=0 account without a password and obtain a root shell via an `/etc/passwd` entry with an empty password field.

Attack Vector Local

Attack Complexity Low

Privileges Required High

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Loytec LIP-ME20xC unaffected
Version Status Constraints
0 affected ≤ 8.4.16
Loytec L-INX unaffected
Version Status Constraints
0 affected ≤ 8.4.16
Loytec L-GATE unaffected
Version Status Constraints
0 affected ≤ 8.4.16
Loytec L-ROC unaffected
Version Status Constraints
0 affected ≤ 8.4.16
Loytec L-IOB unaffected
Version Status Constraints
0 affected ≤ 8.4.16
Loytec L-DALI unaffected
Version Status Constraints
0 affected ≤ 8.4.16
Loytec L-VIS unaffected
Version Status Constraints
0 affected ≤ 8.4.16
Loytec L-PAD unaffected
Version Status Constraints
0 affected ≤ 8.4.16

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

Upgrade to firmware version 8.4.18.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.loytec.com/support/product-security/advisories/8521-dibt-cve-20260526-0003-pam-passwordless-uid-0-authentication-high cve-icon
History

Fri, 24 Jul 2026 18:30:00 +0000

Type Values Removed Values Added
Description Improper Authentication (CWE-287) in the PAM configuration in Loytec LIP-ME201C, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD through 8.4.16 on LINX-A64 allows a local attacker to authenticate as a uid=0 account without a password and obtain a root shell via an `/etc/passwd` entry with an empty password field.
Title Loytec LINX firmware: Improper Authentication in PAM configuration
Weaknesses CWE-287
CWE-521
References
Metrics cvssV4_0

{'score': 8.4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: NCSC.ch

Published:

Updated: 2026-07-24T14:57:20.563Z

Reserved: 2026-06-17T09:48:17.638Z

Link: CVE-2026-12504

cve-icon Vulnrichment

Updated: 2026-07-24T14:57:15.943Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses