CVE-2026-80154 (GCVE-0-2026-80154)
Vulnerability from cvelistv5 – Published: 2026-09-22 15:22 – Updated: 2026-09-22 17:44
VLAI
EPSS
VEX
Title
Lantronix Autonomous Out-of-Band Devices Predictable Session Token with Validation Bypass
Summary
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.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 17:22 UTC
CWE
- CWE-330 - Use of Insufficiently Random Values
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://revrb.net/2026/09/21/revrb-lantern.html | technical-description |
| https://www.vulncheck.com/advisories/lantronix-au… | third-party-advisory |
Impacted products
6 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| LANTRONIX | SLC8000 |
Affected:
*
(custom)
|
guessed | |
| LANTRONIX | EMG8500 |
Affected:
*
(custom)
|
guessed | |
| LANTRONIX | EMG7500 |
Affected:
*
(custom)
|
guessed | |
| LANTRONIX | SLB882 |
Affected:
*
(custom)
|
guessed | |
| LANTRONIX | SLCx-03 |
Affected:
*
(custom)
|
guessed | |
| LANTRONIX | SLCx-02 |
Affected:
*
(custom)
|
guessed |
Date Public
2026-09-18 00:00
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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