Is CVE-2026-19959 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-19959 being exploited in the wild.

How severe is CVE-2026-19959?

Critical severity, with a CVSS score of 9.9, published 16 August 2026.

Is there a fix for CVE-2026-19959?

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-2026-19959 attacked?

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

Am I affected by CVE-2026-19959?

Check whether you run Edimax EW-7478APC 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-2026-19959: Edimax EW-7478APC stack buffer overflow in WAN configuration

CVE-2026-19959 · Severity: critical · CVSS 9.9 · Published 2026-08-16

The Edimax EW-7478APC is a wireless access point and extender used in home and small-office networks. A remote attacker can crash the device or execute arbitrary code by sending a malicious configuration request that overflows an internal memory buffer, without requiring authentication. This could lead to service disruption or complete control over the device.

Technologies: Edimax EW-7478APC. Vendors: Edimax.

Quick answers

Is CVE-2026-19959 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-19959 being exploited in the wild.
How severe is CVE-2026-19959?: Critical severity, with a CVSS score of 9.9, published 16 August 2026.
Which products and versions are affected?: Edimax EW-7478APC 1.04.
Is there a fix for CVE-2026-19959?: 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-2026-19959 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-19959?: Check whether you run Edimax EW-7478APC 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 exists in the formWanTcpipSetup function of the /goform/formWanTcpipSetup endpoint in Edimax EW-7478APC version 1.04. The vulnerability is triggered by supplying an oversized value in the pppUserName argument, which is not properly validated before being copied onto the stack. The flaw is remotely exploitable without authentication and allows an unauthenticated attacker to achieve remote code execution or denial of service. Proof-of-concept exploit code has been publicly disclosed. No vendor patch has been provided at the time of advisory publication.

Affected products

Edimax EW-7478APC 1.04

Timeline

2026-08-16: disclosed
other: Vendor contacted early but did not respond

References

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