CVE-2021-28843

Published: Aug 10, 2021Modified: Jun 17, 2026

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: NVD

Description

Null Pointer Dereference vulnerability exists in TRENDnet TEW-755AP 1.11B03, TEW-755AP2KAC 1.11B03, TEW-821DAP2KAC 1.11B03, and TEW-825DAP 1.11B03 by sending the POST request to apply_cgi with an unknown action name.

Affected (4)

Products: Trendnet: Tew 755ap Firmware, Tew 755ap2kac Firmware, Tew 821dap2kac Firmware, Tew 825dap Firmware

Trendnet

4 products

Tew 755ap Firmware

Tew 755ap2kac Firmware

Tew 821dap2kac Firmware

Tew 825dap Firmware

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Trendnet Tew 755ap Firmware	Version 1.11b03

Running on/with	Platform Versions
Trendnet Tew 755ap	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Trendnet Tew 755ap2kac Firmware	Version 1.11b03

Running on/with	Platform Versions
Trendnet Tew 755ap2kac	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Trendnet Tew 821dap2kac Firmware	Version 1.11b03

Running on/with	Platform Versions
Trendnet Tew 821dap2kac	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Trendnet Tew 825dap Firmware	Version 1.11b03

Running on/with	Platform Versions
Trendnet Tew 825dap	All versions

Related CWEs

CWE-476

NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

References (2)

https://github.com/zyw-200/EQUAFL/blob/main/TRENDnet%20ticket.pdf

Source: cve@mitre.org

Third Party Advisory

https://github.com/zyw-200/EQUAFL/blob/main/TRENDnet%20ticket.pdf

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

Timeline

No history available yet.