CVE-2023-40459: Sierra Wireless ALEOS

High severity, CVSS 7.5. EPSS: 2.3% chance of exploitation in the next 30 days.

The ACEManager component of ALEOS 4.16 and earlier does not adequately perform input sanitization during authentication, which could potentially result in a Denial of Service (DoS) condition for ACEManager without impairing other router functions. ACEManager recovers from the DoS condition by restarting within ten seconds of becoming unavailable.

Affected products

• Sierra Wireless ALEOS: up to and including 4.16.0

Published 2023-12-04. Last modified 2026-06-17.