CVE-2026-7609: A flaw has been found in TRENDnet TEW-821DAP up to 1.12B01

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MEDIUM 6.3MITIGATE

CVE-2026-7609 is a medium-severity flaw (CVSS 6.3) affecting tew-821dap firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 a

Why this priority

EPSS top 9%: very likely to be exploited
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	4.5% (top 9%)
CISA exploited list	No
Weakness	CWE-77, CWE-78
Published	2026-05-02
Last modified	2026-10-26

Publisher (CNA): VulDB · Vendor: trendnet

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-02 10:16 UTCPublished CVE record published
2026-10-26 20:10 UTCUpdated Record last modified

trendnet tew-821dap firmware MITIGATE

Affected: 1.12b01

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.12b01

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-7609?

tew-821dap firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-7609 being exploited?

CVE-2026-7609 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-7609 affect?

CVE-2026-7609 affects tew-821dap firmware. Severity is medium (CVSS 6.3). 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 exploitati

How urgent is CVE-2026-7609?

Priority 50/100. EPSS top 9%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2026-7607 HIGH 8.8 MITIGATE A security vulnerability has been detected in TRENDnet TEW-821DAP 1.12B01
CVE-2026-7608 MEDIUM 5.5 MITIGATE A vulnerability was detected in TRENDnet TEW-821DAP up to 1.12B01
CVE-2026-7610 LOW 3.7 MITIGATE A vulnerability has been found in TRENDnet TEW-821DAP 1.12B01
CVE-2026-7606 LOW 3.7 MITIGATE A weakness has been identified in TRENDnet TEW-821DAP 1.12B01
CVE-2026-7611 LOW 3.7 MITIGATE A vulnerability was found in TRENDnet TEW-821DAP up to 1.12B01

References

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