Is CVE-2026-13517 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-13517 being exploited in the wild.

How severe is CVE-2026-13517?

High severity, with a CVSS score of 8.8, published 29 June 2026.

Is there a fix for CVE-2026-13517?

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-2026-13517 attacked?

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

Am I affected by CVE-2026-13517?

Check whether you run Tenda JD12L Pro 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-2026-13517: Tenda JD12L Pro stack overflow in WifiBasicSet

CVE-2026-13517 · Severity: high · CVSS 8.8 · Published 2026-06-29

A security vulnerability has been identified in the Tenda JD12L Pro router, a device used to provide wireless internet connectivity. An attacker can exploit this flaw to crash the router's management interface or potentially take full control of the device. This could allow an unauthorized user to monitor network traffic or use the compromised router to launch further attacks on other devices within the home or office network.

Technologies: Tenda JD12L Pro. Vendors: Tenda.

Quick answers

Is CVE-2026-13517 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-13517 being exploited in the wild.
How severe is CVE-2026-13517?: High severity, with a CVSS score of 8.8, published 29 June 2026.
Which products and versions are affected?: Tenda JD12L Pro 16.03.53.23.
Is there a fix for CVE-2026-13517?: 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-2026-13517 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-13517?: Check whether you run Tenda JD12L Pro 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 exists in the Tenda JD12L Pro router (firmware version 16.03.53.23) within the 'formWifiBasicSet' function of the '/goform/WifiBasicSet' file. The vulnerability is caused by the unsafe use of the 'strcpy' function when processing the 'security_5g' parameter from a POST request, which fails to validate the input length against the fixed 256-byte target buffer. A remote attacker can exploit this by sending a specially crafted, oversized POST request to overwrite adjacent memory on the stack. Successful exploitation can lead to a Denial of Service (DoS) by crashing the web server or arbitrary code execution by overwriting return addresses. While some reports suggest authentication may be required (PR:L), a public Proof of Concept (PoC) indicates the flaw might be triggered without authentication.

Affected products

Tenda JD12L Pro 16.03.53.23

Timeline

2026-05-27: disclosed: Initial vulnerability report on GitHub
2026-06-29: advisory: CVE published to NVD dataset

References

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