Critical severity · published Aug 22, 2026
CVE-2026-77946
TRENDnet TEW-821DAP NTP Timezone Configuration apply_time.cgi uci_safe_get stack-based overflow
10.0
CVSS
1%
EPSS
No
On KEV
Description
A vulnerability was determined in TRENDnet TEW-821DAP 2.2.01b05. Affected by this vulnerability is the function uci_safe_get of the file /cgi-bin/apply_time.cgi of the component NTP Timezone Configuration Handler. Executing a manipulation of the argument system.ntp.server/system.ntp.enable_server/cameo.time.time_zone/cameo.cameo.syslog_server can lead to stack-based buffer overflow. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 63% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TE
TEW-821DAP · TRENDnet
2.2.01b05 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-77946
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-77946
github.com
https://github.com/dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/main/TEW-821DAP_ssi_NTP_Timezone_Config_Stack_Overflow.md
vuldb.com
https://vuldb.com/cve/CVE-2026-77946
vuldb.com
https://vuldb.com/submit/881252
vuldb.com
https://vuldb.com/vuln/394175
vuldb.com
https://vuldb.com/vuln/394175/cti
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