CVE-2026-77945

TRENDnet TEW-821DAP ssi upload.cgi command injection

5.3 Medium

A vulnerability was found in TRENDnet TEW-821DAP 2.2.01b05. Affected is an unknown function of the file /cgi-bin/upload.cgi of the component ssi. Performing a manipulation of the argument filename results in command injection. The attack may be initiated remotely. The exploit has been made public and could be used.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: Low

Exploit likelihood

1.77%Unchanged since Aug 23, 2026

What each source reports

CVE List Score used 5.3

TRENDnet TEW-821DAP ssi upload.cgi command injection

Record: CVE-2026-77945
CVSS 4.0: 5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P
CVSS 3.1: 7.4 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:P/RL:X/RC:R
CVSS 3.0: 7.4 HighCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:P/RL:X/RC:R
CVSS 2.0: 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
Weakness: CWE-77, CWE-74
Updated: 2026-11-02

EUVDEUVD-2026-64245 5.3

Record: EUVD-2026-64245
CVSS 4.0: 5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P
Updated: 2026-11-02

GitHub AdvisoriesGHSA-399f-4wg3-w73h 2.1

A vulnerability was found in TRENDnet TEW-821DAP 2.2.01b05. Affected is an unknown function of...

Record: GHSA-399f-4wg3-w73h
CVSS 4.0: 2.1 LowCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 7.4 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
Weakness: CWE-74
Updated: 2026-11-02

NVD 2.1

Record: CVE-2026-77945
CVSS 4.0: 2.1 LowCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 7.4 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
CVSS 2.0: 6.5 MediumAV:N/AC:L/Au:S/C:P/I:P/A:P
Weakness: CWE-74, CWE-77
Updated: 2026-11-02

Affected products

trendnet tew-821dap

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-77945 is a medium vulnerability (CVSS 5.3) in Trendnet Tew-821dap, published August 22, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.77%, the 78th percentile. No source names a fixed version.