Is CVE-2026-15543 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-15543 being exploited in the wild.

How severe is CVE-2026-15543?

High severity, with a CVSS score of 8.8, published 13 July 2026.

Is there a fix for CVE-2026-15543?

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-2026-15543 attacked?

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

Am I affected by CVE-2026-15543?

Check whether you run Tenda CH22 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-2026-15543: Tenda CH22 buffer overflow in formCertListInfo

CVE-2026-15543 · Severity: high · CVSS 8.8 · Published 2026-07-13

A vulnerability exists in the Tenda CH22 router that could allow an attacker to disrupt or take control of the device. By sending a specially crafted request to the device's management interface, an attacker can cause a system crash or potentially execute unauthorized commands. This could lead to a total loss of network availability or unauthorized access to data passing through the router.

Technologies: Tenda CH22. Vendors: Tenda.

Quick answers

Is CVE-2026-15543 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-15543 being exploited in the wild.
How severe is CVE-2026-15543?: High severity, with a CVSS score of 8.8, published 13 July 2026.
Which products and versions are affected?: Tenda CH22 1.0.0.1.
Is there a fix for CVE-2026-15543?: 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-2026-15543 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-15543?: Check whether you run Tenda CH22 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 CH22 router, specifically within the 'formCertListInfo' function located in the '/goform/CertListInfo' file. The vulnerability is triggered by improper validation of the 'Name' argument, allowing an attacker to overwrite memory. This attack can be launched remotely by an authenticated user (PR:L). Successful exploitation can lead to arbitrary code execution or a complete denial of service (DoS) of the device. Public exploit code is reportedly available, increasing the risk of exploitation.

Affected products

Tenda CH22 1.0.0.1

Timeline

2026-07-13: disclosed: Vulnerability disclosed via VulDB and NVD

References

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