Lantronix Autonomous Out-of-Band Devices Predictable Session Token with Validation Bypass (CVE-2026-80154) | HOL Guard CVE

High · CVSS 8.9CVE-2026-80154

Lantronix Autonomous Out-of-Band Devices Predictable Session Token with Validation Bypass

Answer in brief

CVE-2026-80154 records a High severity (CVSS 8.9) vulnerability in Lantronix Autonomous Out-of-Band Devices Predictable Session Token with Validation Bypass. The current sources do not mark it as known exploited. The current feed maps LANTRONIX/EMG7500 (generic), LANTRONIX/EMG8500 (generic), LANTRONIX/SLB882 (generic), LANTRONIX/SLC8000 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 22, 2026Updated Sep 22, 2026Source checked Sep 22, 2026First seen by HOL Sep 22, 2026Material review Sep 22, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.9
Exploitation: Not marked as known exploited
Affected software: 6 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

CVSS is 8.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps LANTRONIX/EMG7500 (generic), LANTRONIX/EMG8500 (generic), LANTRONIX/SLB882 (generic), LANTRONIX/SLC8000 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
LANTRONIX/EMG7500generic	*	Not reported
LANTRONIX/EMG8500generic	*	Not reported
LANTRONIX/SLB882generic	*	Not reported
LANTRONIX/SLC8000generic	*	Not reported
LANTRONIX/SLCx-02generic	*	Not reported
LANTRONIX/SLCx-03generic	*	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for LANTRONIX/EMG7500, LANTRONIX/EMG8500, LANTRONIX/SLB882.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 22, 2026

Sources and claim methodology

Upstream source description

All firmware versions of Lantronix SLC8000, 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.

Quoted source text, attributed separately from HOL analysis.