Critical 9.6Published Sep 22, 2026

CVE-2026-80154Lantronix Autonomous Out-of-Band Devices Predictable Session Token with Validation Bypass

Updated under an hour ago (Oct 28, 2026, 4:50 AM ET)

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It affects LANTRONIX SLC8000 and 6 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for LANTRONIX SLC8000

Exploited in the last 30 days

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: 9.6 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-330
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Awaiting Analysis
Record last updated: Sep 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

LANTRONIX SLC8000 lantronix:slc8000 (from the name)	all versions	CNA record
LANTRONIX EMG8500 lantronix:emg8500 (from the name)	all versions	CNA record
LANTRONIX EMG7500 lantronix:emg7500 (from the name)	all versions	CNA record
LANTRONIX SLB882 lantronix:slb882 (from the name)	all versions	CNA record
LANTRONIX SLCx-03 lantronix:slcx_03 (from the name)	all versions	CNA record
LANTRONIX SLCx-02 lantronix:slcx_02 (from the name)	all versions	CNA record
LANTRONIX SLC9000 lantronix:slc9000 (from the name)	all versions	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.