CVE-2026-66086

In the modem OTA stack, there is a possible stack-based buffer overflow due to improper validation of scheduling information in SIB1 messages. This could lead to remote code execution or denial of service with no additional execution privileges needed.

Score

CVSS 3.1 9.8 Critical

Status

Awaiting Analysis - security@unisoc.com

Published

2026-10-12

Last modified

2026-10-16

Weaknesses

CWE-121

Affected products

• Modem (Unisoc Shanghai Technologies Co. Ltd.)

References

• https://www.unisoc.com/en/support/product-security-bulletin/2109454821805424641