CVE-2026-80154: high-severity vulnerability in LANTRONIX SLC8000
Lantronix Autonomous Out-of-Band Devices Predictable Session Token with Validation Bypass
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.9epss 0.6%
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:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Affected products
LANTRONIX · EMG7500LANTRONIX · EMG8500LANTRONIX · SLB882LANTRONIX · SLC8000LANTRONIX · SLC9000LANTRONIX · SLCx-02LANTRONIX · SLCx-03Related CVEs — LANTRONIX SLC8000
In the same product, most dangerous first.
CVE-2026-80145CRITICALLantronix Autonomous Out-of-Band Devices CLI Command Injection via set cifs passwordEPSS 1.9%CVE-2026-80144CRITICALLantronix Autonomous Out-of-Band Devices CLI Command Injection via mfc eeprom writeEPSS 1.7%CVE-2026-80143CRITICALLantronix Autonomous Out-of-Band Devices CLI Command Injection via mfc eeprom readEPSS 1.7%CVE-2026-80152CRITICALLantronix Autonomous Out-of-Band Devices OS Command Injection via set script scheduleEPSS 1.7%CVE-2026-80151CRITICALLantronix Autonomous Out-of-Band Devices OS Command Injection via set nfs downloadEPSS 1.7%CVE-2026-80155CRITICALLantronix Autonomous Out-of-Band Devices Unauthenticated Authentication Bypass via snprintf Path TruncationEPSS 1.0%