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TI-2026-54249 Aliases CVE-2026-77946GHSA-cvhx-h689-9gjx

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

Priority HIGH 82CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0102 63rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TRENDnetTEW-821DAP2.2.01b05—No fix listedCNA
  • TEW-821DAP VendorTRENDnet Affected 2.2.01b05 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:o:trendnet:tew-821dap_firmware:*:*:*:*:*:*:*:*——TRENDnet
  • cpe:2.3:o:trendnet:tew-821dap_firmware:*:*:*:*:*:*:*:* Versions — — ·TRENDnet

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-77946
  2. 2026-10-03 Alias added: GHSA-cvhx-h689-9gjx

References

Exploit 1

  • TI-2015-01070 The ping tool in multiple D-Link and TRENDnet devices allow remote attackers to execute… KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-70883 OS command injection in TRENDnet TEW-751DR and related routers CVSS 4.0CRITICAL 10.0
  • TI-2026-53047 TRENDnet TEW-WLC100 HTTP Header nginx FUN_0040da4c stack-based overflow CVSS 4.0CRITICAL 10.0
  • TI-2026-53046 TRENDnet TEW-WLC100P DHCP blobmsg netifd stack-based overflow CVSS 4.0CRITICAL 9.4
  • TI-2024-37951 TRENDnet TEW-632BRP v1.010B31 devices have an OS command injection vulnerability in the… CVSS 3.1CRITICAL 9.8
  • TI-2024-34076 The boa httpd of Trendnet TEW-820AP 1.01.B01 has a stack overflow vulnerability in… CVSS 3.1CRITICAL 9.8
See all 240 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences