CVE-2021-28846

MEDIUM
6.5
CVSS Score
Published: August 10, 2021 at 07:22 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
MEDIUM6.5
Exploit prediction
EPSS 0.8%

Description

A Format String vulnerablity 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 of service due to a logic bug at address 0x40dcd0 when calling fprintf with "%s: key len = %d, too long\n" format. The two variables seem to be put in the wrong order. The vulnerability could be triggered by sending the POST request to apply_cgi with a long and unknown key in the request body.

Affected

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

trendnet-tew-755ap (same device)
trendnet-tew-755ap2kac (same device)
trendnet-tew-821dap2kac (same device)
trendnet-tew-825dap (same device)
All versions
All versions
All versions
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)

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-134

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