CVE-2026-7609

TRENDnet TEW-821DAP Firmware Udpate diagnostic tools_diagnostic os command injection

HIGH
8.8
CVSS Score
Published: May 2, 2026 at 09:00 AM UTC
Updated: October 26, 2026 at 08:10 PM UTC
1 product affected across 1 vendorTew 821DAP Firmware· also runs on 1 platform

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Severity
HIGH8.8
Exploit prediction
EPSS 5%
SSVC
PoC

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. 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

trendnet-tew-821dap (same device)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (4)

VDB EntryTechnical DescriptionThird Party Advisory
Source: cverecord
https://vuldb.com/vuln/360566
SignaturePermissions RequiredVDB Entry
Source: cverecord
https://vuldb.com/vuln/360566/cti
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/submit/806216

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-78CWE-77

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