TRENDnet TI-PG1284i prior 2.0.2.S0 lldp null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in TRENDnet TI-PG1284i. It has been rated as problematic. Affected by this issue is some unknown functionality of the component lldp. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-476. Impacted is availability. CVE summarizes:

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.

The weakness was presented 05/12/2022. The advisory is shared for download at This vulnerability is handled as CVE-2021-33317 since 05/20/2021. The exploitation is known to be easy. The attack can only be initiated within the local network. A simple authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 2.0.2.S0 eliminates this vulnerability.




CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍



VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍


Class: Denial of service
CWE: CWE-476
ATT&CK: Unknown

Local: No
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒


Threat Intelligenceinfoedit

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: TI-PG1284i 2.0.2.S0


05/20/2021 CVE reserved
05/12/2022 +357 days Advisory disclosed
05/12/2022 +0 days VulDB entry created
05/14/2022 +2 days VulDB last update


Status: Confirmed

CVE: CVE-2021-33317 (🔒)


Created: 05/12/2022 12:05 PM
Updated: 05/14/2022 02:06 PM
Changes: (1) source_cve_nvd_summary
Complete: 🔍


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