Is CVE-2026-90688 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-90688 being exploited in the wild.

How severe is CVE-2026-90688?

Medium severity, with a CVSS score of 6.5, published 14 September 2026.

Which products and versions are affected?

Tenda W20E 15.11.0.61068_1546_841_CN_TDC.

Is there a fix for CVE-2026-90688?

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-2026-90688 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-90688?

Check whether you run Tenda W20E 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-2026-90688: Tenda W20E stack buffer overflow in formIPMacBindAdd

CVE-2026-90688 · Severity: medium · CVSS 6.5 · Published 2026-09-14

The Tenda W20E is a Wi-Fi router used by consumers and small businesses to provide network connectivity. A flaw in the router's web management interface allows remote attackers to send specially crafted network requests that corrupt the router's memory, causing the web management service to crash and disrupting access to the router's administration panel.

Technologies: Tenda W20E. Vendors: Tenda.

Quick answers

Is CVE-2026-90688 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-90688 being exploited in the wild.
How severe is CVE-2026-90688?: Medium severity, with a CVSS score of 6.5, published 14 September 2026.
Which products and versions are affected?: Tenda W20E 15.11.0.61068_1546_841_CN_TDC.
Is there a fix for CVE-2026-90688?: 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-2026-90688 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-90688?: Check whether you run Tenda W20E 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

The vulnerability is a stack-based buffer overflow in the formIPMacBindAdd HTTP handler of the Tenda W20E router. The vulnerable component fails to perform length validation on the IPMacBindRule parameter before copying it into fixed-size stack buffers using unbounded strcpy operations (CWE-121). An attacker on the network can remotely send an oversized IPMacBindRule value through the HTTP handler to trigger stack memory corruption. The resulting overflow causes the web management process to crash, causing denial of service of the router administration interface. The vulnerability affects firmware version 15.11.0.61068_1546_841_CN_TDC and potentially other versions.

Affected products

Tenda W20E 15.11.0.61068_1546_841_CN_TDC

Timeline

2026-09-14: disclosed

References

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