CVE-2026-80154

9.6 CRITICAL

Published 2026-09-22 · Updated 2026-09-24

AI risk analysis

Summary: The flaw allows unauthenticated attackers to derive valid session tokens and bypass security checks, leading to unauthorized access and potential device control.
Exploitability: Exploitation is moderately hard due to the need to construct a specific URI, but preconditions include access to the web management portal.
Blast radius: If exploited, attackers could gain full control over the device and its connected serial-attached devices, leading to significant operational disruptions.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Disable the web management portal feature or restrict access to it from untrusted networks.

auth-bypasswebsessiondevice-control

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Weaknesses

CWE-330

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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