CVE-2026-77946: TRENDnet TEW-821DAP

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

CVSS 10.0 CriticalCriticalEPSS 0.010 · 63rd percentile

Critical, because:

CVSS score 10.0: 9.0 or more.

Published by the CVE Program (CNA: VulDB) at 22 Aug 2026, 11:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
TRENDnet	TEW-821DAP	affected 2.2.01b05

Identifiers

CVE-2026-77946

CNA

VulDB

Weakness (CWE)

CWE-119 · CWE-121

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
10.0	Critical	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P	CNA (VulDB)Used for this record
10.0	Critical	3.1	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	CNA (VulDB)
10.0	Critical	3.0	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R	CNA (VulDB)
10.0	High	2.0	AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR	CNA (VulDB)

CISA KEV Not listed.
EPSS 0.010, the 63rd percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 22 Aug 2026. New records show when each source confirmed them.

Sources

References from the CNA

vuldb.com/vuln/394175 vdb-entrytechnical-description
vuldb.com/vuln/394175/cti signaturepermissions-required
vuldb.com/cve/CVE-2026-77946 third-party-advisory
vuldb.com/submit/881252 third-party-advisory
github.com/dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/main/TEW-821DAP_ssi_NTP_Timezone_Config_Stack_Overflow.md exploit

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.