All vulnerabilities
CVE-2026-66086

Stack-based Buffer Overflow in Modem

Unisoc (Shanghai) Technologies Co., Ltd. Modem
Open in ThreatlineRecord JSON
CVSS
8.3High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.46%Chance of exploitation activity in the next 30 days, higher than 38% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published12 Oct 2026Updated 15 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

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.

Text from CVE List

Affected versions 3

  • Modemaffected: T8100CVE List
  • Modemaffected: T9100CVE List
  • Modemaffected: UDX710CVE List

References 1