What’s Vulnerable › Vulnerabilities

CVE-2021-33317

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-05-11 · updated 2026-06-17
• Weakness: CWE-476

Description

The TRENDnet TI-PG1284i switch(hw v2.0R) prior to version 2.0.2.S0 suffers from a null pointer dereference vulnerability. This vulnerability exists in its lldp related component. Due to fail to check if ChassisID TLV is contained in the packet, by sending a crafted lldp packet to the device, an attacker can crash the process due to null pointer dereference.

Affected products

• TRENDnet Teg-30102Ws Firmware: all versions
• TRENDnet Ti-G102I Firmware: all versions
• TRENDnet Ti-G160I Firmware: all versions
• TRENDnet Ti-G642I Firmware: all versions
• TRENDnet Ti-Pg102I Firmware: all versions
• TRENDnet Ti-Pg1284I Firmware: before 2.0.2.s0 — fixed in 2.0.2.s0
• TRENDnet Ti-Pg541I Firmware: all versions
• TRENDnet Ti-Rp262I Firmware: all versions
• TRENDnet Tpe-30102Ws Firmware: all versions

How to fix

Upgrade to a fixed version: TRENDnet Ti-Pg1284I Firmware 2.0.2.s0. Check the vendor advisory for mitigations.

References

• https://www.trendnet.com/support/view.asp?cat=4&id=81
• https://www.trendnet.com/support/view.asp?cat=4&id=81

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