Is CVE-2026-9428 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-9428 being exploited in the wild.

How severe is CVE-2026-9428?

High severity, with a CVSS score of 8.8, published 25 May 2026.

Is there a fix for CVE-2026-9428?

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-2026-9428 attacked?

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

Am I affected by CVE-2026-9428?

Check whether you run Tenda F1202 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-2026-9428: Tenda F1202 stack overflow in fromPPTPUserSetting

CVE-2026-9428 · Severity: high · CVSS 8.8 · Published 2026-05-25

A security vulnerability exists in the Tenda F1202 wireless router, a device used to provide internet connectivity for homes and small offices. An attacker can exploit this flaw to crash the router or potentially take full control of the device by sending a specially crafted web request. This could lead to a complete loss of internet access or allow an unauthorized user to monitor network traffic.

Technologies: Tenda F1202. Vendors: Tenda.

Quick answers

Is CVE-2026-9428 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-9428 being exploited in the wild.
How severe is CVE-2026-9428?: High severity, with a CVSS score of 8.8, published 25 May 2026.
Which products and versions are affected?: Tenda F1202 1.2.0.20(408).
Is there a fix for CVE-2026-9428?: 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-2026-9428 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-9428?: Check whether you run Tenda F1202 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 'httpd' binary of the Tenda F1202 router, specifically within the 'fromPPTPUserSetting' function in the '/goform/PPTPUserSetting' file. The vulnerability is caused by the unsafe use of the 'sprintf' function when processing the user-provided 'delno' parameter without adequate length validation. A remote attacker with low privileges can exploit this by sending a crafted POST request, leading to memory corruption. This can result in a denial of service (DoS) or remote code execution (RCE). A public exploit (PoC) has been disclosed.

Affected products

Tenda F1202 1.2.0.20(408)

Timeline

2026-05-25: disclosed: Vulnerability disclosed and CVE assigned via VulDB.
2026-05-25: advisory: NVD published the vulnerability record.

References

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