CVE-2026-80150
Received Received - Intake

Server-Side Request Forgery in Lantronix SLC8000, EMG8500, EMG7500, and SLB882

Publication date: 2026-09-22

Last updated on: 2026-09-22

Assigner: VulnCheck

Description
Lantronix SLC8000 before firmware v9.7.0.3, EMG8500/EMG7500 before firmware v9.7.0.1, and all firmware versions of SLB882 contain a server-side request forgery vulnerability in the WebSSH/WebTelnet listener that allows unauthenticated attackers to cause the affected device to establish Telnet connections to attacker-controlled endpoints. The custom shellinaboxd uses the rooturl parameter from the web connection to determine its own IP address; by modifying this parameter an attacker redirects the Telnet terminal connection to an arbitrary host or IP. Attackers can use this capability to enumerate or communicate with internal network endpoints that would otherwise be inaccessible.

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Meta Information

Published
2026-09-22
Last Modified
2026-09-22
Generated
2026-09-22
AI Q&A
2026-09-22
EPSS Evaluated
N/A
NVD
CVE-2026-80150
EUVD
EUVD-2026-84516

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
lantronix slc8000 to 9.7.0.3 (exc)
lantronix emg8500 to 9.7.0.1 (exc)
lantronix emg7500 to 9.7.0.1 (exc)
lantronix slb882 *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Attack-Flow Graph

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Executive Summary

This vulnerability is a server-side request forgery (SSRF) in Lantronix devices including SLC8000, EMG8500, EMG7500, and SLB882. It exists in the WebSSH/WebTelnet listener due to improper handling of the rooturl parameter. Attackers can modify this parameter to redirect Telnet connections to arbitrary hosts, enabling access to internal network endpoints that should be restricted.

Detection Guidance

To detect this vulnerability, check if your Lantronix device is running an affected firmware version. For SLC8000, verify if firmware is below v9.7.0.3. For EMG8500/EMG7500, check if firmware is below v9.7.0.1. All versions of SLB882 are vulnerable. Inspect network traffic for unexpected Telnet connections initiated by the device.

Impact Analysis

Unauthenticated attackers could exploit this to connect to internal systems via Telnet, potentially allowing them to enumerate or interact with sensitive network devices. This could lead to unauthorized access, data exfiltration, or further network compromise depending on the internal systems targeted.

Compliance Impact

This SSRF vulnerability could lead to unauthorized access to internal network services, potentially exposing sensitive data. For GDPR, this may violate principles of data protection and security. For HIPAA, it could allow unauthorized access to protected health information if internal systems are compromised.

Mitigation Strategies

Immediately update affected Lantronix devices to the latest firmware versions: SLC8000 to v9.7.0.3, EMG8500/EMG7500 to v9.7.0.1. Disable WebSSH/WebTelnet listeners if not required. Restrict network access to these services to prevent unauthorized use.

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