Stack-based Buffer Overflow in Unisoc Modem OTA Stack
CVE-2026-66086

8.3HIGH

Key Information:

Vendor

Unisoc (shanghai) Technologies Co., Ltd.

Status
Modem
Vendor
CVE Published:
12 October 2026

What is CVE-2026-66086?

A stack-based buffer overflow vulnerability exists in the modem OTA stack of Unisoc products. This issue arises from improper validation of scheduling information in SIB1 messages. Exploitation of this vulnerability can potentially allow an attacker to execute arbitrary code remotely or cause a denial of service, requiring no additional execution privileges.

Affected Version(s)

Modem T8100

Modem T9100

Modem UDX710

References

https://www.unisoc.com/en/support/product-security-bullet...

CVSS V3.1

Score:
8.3
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.