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CVE-2026-80154— Lantronix Autonomous Out-of-Band Devices Predictable Session Token with Validation Bypass

Quick assessment

Affected
LANTRONIX SLC8000
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 b

CVSS 9.6 · Critical

Affected Version Matrix 6

VendorProduct Version RangeStatus
LANTRONIX EMG7500 * affected
LANTRONIX EMG8500 * affected
LANTRONIX SLB882 * affected
LANTRONIX SLC8000 * affected
LANTRONIX SLCx-02 * affected
LANTRONIX SLCx-03 * affected
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I. Basic Information for CVE-2026-80154

Vulnerability Information

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Vulnerability Title
Lantronix Autonomous Out-of-Band Devices Predictable Session Token with Validation Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用不充分的随机数
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
LANTRONIX SLC8000 * -
LANTRONIX EMG8500 * -
LANTRONIX EMG7500 * -
LANTRONIX SLB882 * -
LANTRONIX SLCx-03 * -
LANTRONIX SLCx-02 * -

II. Public POCs for CVE-2026-80154

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III. Intelligence Information for CVE-2026-80154

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Other References for CVE-2026-80154 (2)

Same Patch Batch · LANTRONIX · 2026-09-22 · 13 CVEs total

CVE-2026-80155 10.0 CRITICAL Lantronix Autonomous Out-of-Band Devices Unauthenticated Authentication Bypass via snprint
CVE-2026-80144 9.9 CRITICAL Lantronix Autonomous Out-of-Band Devices CLI Command Injection via mfc eeprom write
CVE-2026-80147 9.9 CRITICAL Lantronix Autonomous Out-of-Band Devices Stack-Based Buffer Overflow via mfc eeprom write
CVE-2026-80146 9.9 CRITICAL Lantronix Autonomous Out-of-Band Devices Stack-Based Buffer Overflow via mfc eeprom read
CVE-2026-80143 9.9 CRITICAL Lantronix Autonomous Out-of-Band Devices CLI Command Injection via mfc eeprom read
CVE-2026-80145 9.1 CRITICAL Lantronix Autonomous Out-of-Band Devices CLI Command Injection via set cifs password
CVE-2026-80156 9.1 CRITICAL Lantronix Autonomous Out-of-Band Devices Arbitrary File Write via Upload Filename Validati
CVE-2026-80151 9.1 CRITICAL Lantronix Autonomous Out-of-Band Devices OS Command Injection via set nfs download
CVE-2026-80152 9.1 CRITICAL Lantronix Autonomous Out-of-Band Devices OS Command Injection via set script schedule
CVE-2026-80148 8.6 HIGH Lantronix Autonomous Out-of-Band Devices WebSSH SSRF via Username Truncation
CVE-2026-80149 8.6 HIGH Lantronix Autonomous Out-of-Band Devices WebSSH SSRF via rooturl Parameter
CVE-2026-80150 7.5 HIGH Lantronix Autonomous Out-of-Band Devices WebTelnet SSRF via rooturl Parameter

IV. Related Vulnerabilities

Same product: SLC8000
Same vendor: LANTRONIX
Same weakness: CWE-330

V. Comments for CVE-2026-80154

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