Is CVE-2026-76589 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-76589 being exploited in the wild.

How severe is CVE-2026-76589?

Critical severity, with a CVSS score of 9.9, published 19 August 2026.

Which products and versions are affected?

TRENDnet TEW-755AP up to 20260702.

Is there a fix for CVE-2026-76589?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-76589 attacked?

It is attacked over the network or from the adjacent network, in a network appliance.

Am I affected by CVE-2026-76589?

Check whether you run TRENDnet TEW-755AP at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-76589: TRENDnet TEW-755AP stack buffer overflow in mycli

CVE-2026-76589 · Severity: critical · CVSS 9.9 · Published 2026-08-19

TRENDnet TEW-755AP is a wireless access point used to provide network connectivity. A stack buffer overflow vulnerability in the mycli daemon allows an attacker to trigger a denial of service or potentially execute arbitrary code by sending a specially crafted Wi-Fi SSID configuration, exploitable without direct network access since the SSID is broadcast in beacon frames.

Technologies: TRENDnet TEW-755AP. Vendors: TRENDnet.

Quick answers

Is CVE-2026-76589 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-76589 being exploited in the wild.
How severe is CVE-2026-76589?: Critical severity, with a CVSS score of 9.9, published 19 August 2026.
Which products and versions are affected?: TRENDnet TEW-755AP up to 20260702.
Is there a fix for CVE-2026-76589?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-76589 attacked?: It is attacked over the network or from the adjacent network, in a network appliance.
Am I affected by CVE-2026-76589?: Check whether you run TRENDnet TEW-755AP at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A stack-based buffer overflow vulnerability (CWE-121) exists in the /sbin/mycli daemon of TRENDnet TEW-755AP, triggered by improper bounds checking on the SSID argument in function FUN_401000. An attacker can craft a malicious SSID value exceeding the buffer limit (68+ bytes) to overwrite the stack, including the return address. The attack is remotely deliverable via Wi-Fi beacon frame injection and does not require authentication or network access to the device's management interface. Exploitation can result in denial of service or remote code execution; a proof-of-concept has been published publicly.

Affected products

TRENDnet TEW-755AP up to 20260702

Timeline

2026-08-19: disclosed
other: Public exploit code published on GitHub

References

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