Vulnerability · Published Aug 22, 2026 · Assigned by VulDB

CVE-2026-77946TRENDnet TEW-821DAP NTP Timezone Configuration apply_time.cgi uci_safe_get stack-based overflow

Critical 10.0

In plain English

A critical-severity stack buffer overflow in TEW-821DAP from TRENDnet. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 64% of all known vulnerabilities).

Severity (CVSS 3.1)10.0Critical

Exploit odds (30 days)1.0%top 36.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
TRENDnet	TEW-821DAP	2.2.01b05

Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-394175 | TRENDnet TEW-821DAP NTP Timezone Configuration apply_time.cgi uci_safe_get stack-based overflow vdb-entry, technical-description
VDB-394175 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-77946 | CVE Analysis and Report third-party-advisory
Submit #881252 | TRENDnet TEW-821DAP Wireless Access Point v2.2.01b05 Stack-based Buffer Overflow third-party-advisory
https://github.com/dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/main/TEW-821DAP_ssi_NTP_Timezone_Config_Stack_Overflow.md exploit