CVE-2023-43478: Telstra Arcadyan LH1000 Firmware

Critical severity, CVSS 9.8. EPSS: 18% chance of exploitation in the next 30 days.

fake_upload.cgi on the Telstra Smart Modem Gen 2 (Arcadyan LH1000), firmware versions < 0.18.15r, allows unauthenticated attackers to upload firmware images and configuration backups, which could allow them to alter the firmware or the configuration on the device, ultimately leading to code execution as root. 

Affected products

• Telstra Arcadyan LH1000 Firmware: before 0.18.15r (fixed in 0.18.15r)

Published 2023-09-20. Last modified 2026-06-17.