Answer in brief
CVE-2026-80156 records a Critical severity (CVSS 9.4) vulnerability in Lantronix Autonomous Out-of-Band Devices Arbitrary File Write via Upload Filename 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.
CVSS is 9.4. 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.
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.
| Package | Affected range | Fixed version |
|---|---|---|
| LANTRONIX/EMG7500generic | >=0 <9.7.0.1 | 9.7.0.1 |
| LANTRONIX/EMG8500generic | >=0 <9.7.0.1 | 9.7.0.1 |
| LANTRONIX/SLB882generic | * | Not reported |
| LANTRONIX/SLC8000generic | >=0 <9.7.0.5 | 9.7.0.5 |
| LANTRONIX/SLCx-02generic | * | Not reported |
| LANTRONIX/SLCx-03generic | * | Not reported |
Published upstream
Sep 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 22, 2026
Lantronix SLC8000 before firmware v9.7.0.5, EMG8500/EMG7500 before firmware v9.7.0.1, and all firmware versions of SLB882/SLCx-03/SLCx-02 contain a path traversal vulnerability in the web management portal upload endpoint that allows authenticated attackers to write arbitrary data to any location on the device's filesystem, leading to remote code execution. The upload filename validation strips backslash characters but does not subsequently check for forward slashes when a backslash is detected; by supplying a filename containing both characters an attacker writes outside the intended upload directory to any writable path. Attackers can use this vulnerability to achieve complete loss of confidentiality, integrity, and availability on the affected device and potentially impact downstream serial-connected devices.
Quoted source text, attributed separately from HOL analysis.