Is CVE-2026-66086 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-66086?

CVE-2026-66086 has a CVSS v3 severity of CRITICAL (9.8).

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CVE-2026-66086

Description

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.