CVE-2026-80151 LANTRONIX CVE debrief

Who should care

System administrators and security teams responsible for Lantronix devices, particularly those managing SLC8000, SLC9000, EMG8500, EMG7500, SLB882, SLCx-03, and SLCx-02 devices, should assess exposure and prioritize firmware updates to prevent potential loss of confidentiality, integrity, and availability on affected devices and downstream serial-attached devices.

Why it matters

CVE-2026-80151 is a critical command injection vulnerability in Lantronix devices that allows authenticated attackers to execute arbitrary shell commands as root. System administrators and security teams should assess exposure and prioritize firmware updates to prevent potential loss of confidentiality, integrity, and availability.

• Potential loss of confidentiality, integrity, and availability on affected devices
• Possible impact on downstream serial-attached devices
• Need for inventory checks and firmware updates
• Potential for lateral movement and further exploitation

Technical summary

The Lantronix SLC8000, SLC9000, EMG8500, EMG7500, SLB882, SLCx-03, and SLCx-02 devices contain a command injection vulnerability in the set nfs download command. This allows authenticated attackers with services permission to execute arbitrary shell commands as root, potentially impacting device and downstream serial-attached device confidentiality, integrity, and availability. Affected product deployments require immediate review for exposure and prioritization of firmware updates to prevent potential loss of confidentiality, integrity, and availability.

Defensive priority

High priority for inventory checks and firmware updates

Recommended defensive actions

• Inventory Lantronix SLC8000, SLC9000, EMG8500, EMG7500, SLB882, SLCx-03, and SLCx-02 devices for potential exposure
• Verify and apply firmware updates to vulnerable versions
• Restrict access to the terminal or CLI interface
• Monitor for suspicious activity on affected devices
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. However, the vendor's official response and additional information from other sources are limited. Grounding in source evidence suggests that defenders verify system configurations, review access controls, and assess potential impact on downstream serial-attached devices. Evidence limits currently prevent confirmation of all affected scope and required updates.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.