Login Request a demo
Medium severity · published Aug 10, 2021
CVE-2021-28846
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…
6.5
CVSS
0.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 57% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TF
Tew-755ap Firmware · Trendnet
1.11b03 · source: NVD
TF
Tew-755ap2kac Firmware · Trendnet
1.11b03 · source: NVD
TF
Tew-821dap2kac Firmware · Trendnet
1.11b03 · source: NVD
TF
Tew-825dap Firmware · Trendnet
1.11b03 · source: NVD
Affected product
TF
Tew-755ap Firmware
Trendnet
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-28846
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-28846
Third Party Advisory
https://github.com/zyw-200/EQUAFL/blob/main/TRENDnet%20ticket.pdf
More from Tew-755ap Firmware
9.9
CVE-2026-76590
TRENDnet TEW-755AP ssi wan.cgi stack-based overflow
9.9
CVE-2026-76589
TRENDnet TEW-755AP mycli FUN_401000 stack-based overflow
9.8
CVE-2022-46601
TRENDnet TEW755AP 1.13B01 was discovered to contain a stack overflow via the setbg_num parameter in the icp_setbg_img (sub_41DD68) function
9.8
CVE-2022-46600
TRENDnet TEW755AP 1.13B01 was discovered to contain a stack overflow via the wps_sta_enrollee_pin parameter in the action set_sta_enrollee_pin_24g function
9.8
CVE-2022-46599
TRENDnet TEW755AP 1.13B01 was discovered to contain a stack overflow via the setlogo_num parameter in the icp_setlogo_img (sub_41DBF4) function