CVE-2026-80154Lantronix Autonomous Out-of-Band Devices Predictable Session Token with Validation Bypass
Updated under an hour ago ()
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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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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
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
- https://revrb.net/2026/09/21/revrb-lantern.htmltechnical-description
- https://www.vulncheck.com/advisories/lantronix-autonomous-out-of-band-devices-predictable-session-token-with-validation-bypassthird-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.