CVE-2021-33317

Name: CVE-2021-33317
Creator: NVD / NIST
Published: 2022-05-11T18:15:22.783+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.85%

Last modified Jun 17, 2026

CVE-2021-33317 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.85% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.85%

53.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Trendnet	Ti-Pg1284i Firmware	< 2.0.2.s0
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-Pg541i Firmware	All versions
Trendnet	Ti-Rp262i Firmware	All versions
Trendnet	Teg-30102ws Firmware	All versions
Trendnet	Tpe-30102ws Firmware	All versions

References

https://www.trendnet.com/support/view.asp?cat=4&id=81Patch, Vendor Advisory
https://www.trendnet.com/support/view.asp?cat=4&id=81Patch, Vendor Advisory

Timeline

Published: May 11, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-33317?

How severe is CVE-2021-33317?

CVE-2021-33317 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.85% probability of exploitation in the next 30 days.

How do I fix CVE-2021-33317?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-33317?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST