CVE-2021-33316: TRENDnet Teg-30102ws Firmware

Critical severity, CVSS 9.8. EPSS: 1.1% chance of exploitation in the next 30 days.

The TRENDnet TI-PG1284i switch(hw v2.0R) prior to version 2.0.2.S0 suffers from an integer underflow vulnerability. This vulnerability exists in its lldp related component. Due to lack of proper validation on length field of ChassisID TLV, by sending a crafted lldp packet to the device, integer underflow would occur and the negative number will be passed to memcpy() later, which may cause buffer overflow or invalid memory access.

Affected products

• TRENDnet Teg-30102ws Firmware: affected versions not specified
• TRENDnet Ti-g102i Firmware: affected versions not specified
• TRENDnet Ti-g160i Firmware: affected versions not specified
• TRENDnet Ti-g642i Firmware: affected versions not specified
• TRENDnet Ti-PG102I Firmware: affected versions not specified
• TRENDnet Ti-PG1284I Firmware: before 2.0.2.s0 (fixed in 2.0.2.s0)
• TRENDnet Ti-PG541I Firmware: affected versions not specified
• TRENDnet Ti-RP262I Firmware: affected versions not specified
• TRENDnet Tpe-30102ws Firmware: affected versions not specified

Published 2022-05-11. Last modified 2026-06-17.