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CVE-2021-28842

HIGH
7.5
CVSS Score
Published: August 10, 2021 at 06:34 PM UTC
Updated: June 17, 2026 at 03:46 AM UTC
8 products affected across 1 vendorTew 755AP FirmwareTew 755AP2KAC FirmwareTew 821DAP2KAC Firmware

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Severity
HIGH7.5
Exploit prediction
EPSS 1.0%

Description

Null Pointer Deference vulnerability exists in TRENDnet TEW-755AP 1.11B03, TEW-755AP2KAC 1.11B03, TEW-821DAP2KAC 1.11B03, and TEW-825DAP 1.11B03, which could let a remote malicious user cause a denial os service by sending the POST request to apply_cgi via action do_graph_auth without login_name key.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Tew 755AP Firmware· Trendnet
95%
1.11b03
trendnet-tew-755ap (same device)
Tew 755AP2KAC Firmware· Trendnet
95%
1.11b03
trendnet-tew-755ap2kac (same device)
Tew 821DAP2KAC Firmware· Trendnet
95%
1.11b03
trendnet-tew-821dap2kac (same device)
Tew 825DAP Firmware· Trendnet
95%
1.11b03
trendnet-tew-825dap (same device)
TEW-755AP· Trendnetdevice
80%
All versions
Tew-755Ap2Kac· Trendnetdevice
80%
All versions
Tew-821Dap2Kac· Trendnetdevice
80%
All versions
Tew-825Dap· Trendnetdevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/zyw-200/EQUAFL/blob/main/TRENDnet%20ticket.pdf

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

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