CVE-2026-80154

Description

All firmware versions of Lantronix SLC8000, SLC9000, EMG8500, EMG7500, SLB882, SLCx-03, and SLCx-02 contain an authentication bypass vulnerability in the web management portal that allows unauthenticated attackers to derive valid session tokens of logged-in users and bypass source IP and User-Agent validation. Session tokens are generated deterministically from the device model and the current time at one-second resolution, resulting in a small enumerable set of possible active tokens. Attackers can construct a crafted URI that exploits file extension handling in the web server path routing to bypass per-session source-address validation, then use a derived token from a different source address to gain elevated privileges on the affected device and potentially impact downstream serial-attached devices.

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Produits concernés

• LANTRONIX SLC8000
• LANTRONIX EMG8500
• LANTRONIX EMG7500
• LANTRONIX SLB882
• LANTRONIX SLCx-03
• LANTRONIX SLCx-02
• LANTRONIX SLC9000

Scores CVSS

Faiblesses (CWE)

• CWE-330

Références

• https://revrb.net/2026/09/21/revrb-lantern.html
• https://www.vulncheck.com/advisories/lantronix-autonomous-out-of-band-devices-predictable-session-token-with-validation-bypass

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories