CVE-2019-11856: Sierra Wireless ALEOS

Low severity, CVSS 3.8. EPSS: 1% chance of exploitation in the next 30 days.

A nonce reuse vulnerability exists in the ACEView service of ALEOS before 4.13.0, 4.9.5, and 4.4.9 allowing message replay. Captured traffic to the ACEView service can be replayed to other gateways sharing the same credentials.

Affected products

• Sierra Wireless ALEOS: up to and including 4.12.0; up to and including 4.9.4; up to and including 4.4.8

Published 2020-08-21. Last modified 2026-06-17.