Cyber Posture

CVE-2026-7609

MediumPublic PoC

Published: 02 May 2026

Published
02 May 2026
Modified
06 May 2026
KEV Added
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Patch
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CVSS Score 6.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
EPSS Score 0.0035 57.6th percentile
Risk Priority 13 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-7609 is a medium-severity Command Injection (CWE-77) vulnerability in Trendnet Tew-821Dap Firmware. Its CVSS base score is 6.3 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 42.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 1 other technique.
Threat & Defense Details

Likely Mitigating ControlsAI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
Why these techniques?

Remote OS command injection (CWE-78) in publicly exposed firmware diagnostic/update function enables direct exploitation of the network device (T1190) and arbitrary Unix shell command execution (T1059.004).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

A flaw has been found in TRENDnet TEW-821DAP up to 1.12B01. The impacted element is the function tools_diagnostic of the file /tmp/diagnostic of the component Firmware Udpate. This manipulation causes os command injection. Remote exploitation of the attack is possible.…

more

The exploit has been published and may be used. The vendor explains: "That firmware version will only work on our hardware version v1.xR. We have already EOL that product 8 years ago and are no longer selling". This vulnerability only affects products that are no longer supported by the maintainer.

Deeper analysisAI

Automated synthesis unavailable for this CVE.

Details

CWE(s)
CWE-77CWE-78

Affected Products

trendnet
tew-821dap firmware
1.12b01

CVEs Like This One

CVE-2026-7607Same product: Trendnet Tew-821Dap
CVE-2025-15471Same vendor: Trendnet
CVE-2025-15472Same vendor: Trendnet
CVE-2026-5352Same vendor: Trendnet
CVE-2026-5354Same vendor: Trendnet
CVE-2024-57590Same vendor: Trendnet
CVE-2024-46484Same vendor: Trendnet
CVE-2026-5355Same vendor: Trendnet
CVE-2026-5351Same vendor: Trendnet
CVE-2026-5353Same vendor: Trendnet

References