CVE-2021-33316

Name: CVE-2021-33316
Creator: NVD / NIST
Published: 2022-05-11T18:15:22.723+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.98%

Last modified Jun 17, 2026

CVE-2021-33316 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 0.98% 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 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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.98%

57.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

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-2021-33316?

How severe is CVE-2021-33316?

CVE-2021-33316 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.98% probability of exploitation in the next 30 days.

How do I fix CVE-2021-33316?

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-2021-33316?

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

Scan your code now

Source: NVD / NIST