RCE in Lantronix Emg7500
CVE-2026-80144
Lantronix SLC8000/SLC9000 before firmware v9.7.0.2, EMG8500/EMG7500 before firmware v9.7.0.1, and all firmware versions of SLB882/SLCx-03/SLCx-02 contain a command injection vulnerability that allows authenticated attackers to execute arbitrary shell commands as root by exploiting an undocumented mfc eeprom write command that passes unsanitized user input to a system() call. Attackers can authenticate as any user to the terminal or CLI interface and inject malicious commands through the unsanitized parameter to achieve complete loss of confidentiality, integrity, and availability on the affected device and potentially impact downstream serial-attached devices.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.017 (77.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.017 · change: +0.002
Affected products
Weakness classification (CWE)
References
- revrb.net/2026/09/21/revrb-lantern.html (technical-description)
- ts.lantronix.com/ftp/slc8000/9.7.0.2R1/ (patch)
- ts.lantronix.com/ftp/emg/EMG_8500/9.7.0.1R2/ (patch)
- ts.lantronix.com/ftp/emg/EMG_7500/9.7.0.1R2/ (patch)
- www.vulncheck.com/advisories/lantronix-autonomous-out-of-band-devices-cli-comma… (third-party-advisory)
- ts.lantronix.com/ftp/SLC9000/9.7.0.2R1/ (patch)
Frequently asked questions
- What is CVE-2026-80144?
- CVE-2026-80144 is a critical-severity vulnerability in Lantronix Emg7500, classified under OS Command Injection. CVSS score: 9.9/10. Published 2026-09-22.
- How severe is CVE-2026-80144?
- Critical severity. CVSS v3 base score is 9.9 out of 10.