Vulnerability · Published Oct 12, 2026 · Assigned by Unisoc
CVE-2026-66086Stack-based Buffer Overflow in Modem
High 8.3
In plain English
A high-severity stack buffer overflow in Modem from Unisoc (Shanghai) Technologies Co., Ltd.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).
Severity (CVSS 3.1)8.3High
Exploit odds (30 days)0.5%top 60.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Unisoc (Shanghai) Technologies Co., Ltd. | Modem | T8100T9100UDX710 |
Weakness: CWE-121 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H