CVE-2019-11848: ALEOS AT Command API Abuse

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-08-21 · updated 2026-06-17
Weakness: CWE-787

Description

An API abuse vulnerability exists in the AT command API of ALEOS before 4.13.0, 4.9.5, 4.4.9 due to lack of length checking when handling certain user-provided values.

Affected products

SierraWireless ALEOS: before 4.13.0; before 4.9.5; before 4.4.9 — fixed in 4.13.0, 4.4.9, 4.9.5

How to fix

Upgrade to a fixed version: SierraWireless ALEOS 4.13.0, 4.4.9, 4.9.5. Check the vendor advisory for mitigations.

References

https://source.sierrawireless.com/resources/security-bulletins/sierra-wireless-technical-bulletin---swi-psa-2020-004/
https://source.sierrawireless.com/resources/security-bulletins/sierra-wireless-technical-bulletin---swi-psa-2020-004/

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