Is CVE-2026-11553 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-11553 being exploited in the wild.

How severe is CVE-2026-11553?

High severity, with a CVSS score of 8.8, published 8 June 2026.

Which products and versions are affected?

Tenda HG10 AC1200 Dual-Band Wi-Fi xPON ONT 300001138_en_xpon; Tenda HG7 300001138_en_xpon; Tenda HG9 300001138_en_xpon.

Is there a fix for CVE-2026-11553?

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-2026-11553 attacked?

It is attacked over the network, in an operating system.

Am I affected by CVE-2026-11553?

Check whether you run Tenda HG10 AC1200 Dual-Band Wi-Fi xPON ONT, Tenda HG7 or Tenda HG9 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-2026-11553: Tenda HG Series stack overflow in formPPPEdit

CVE-2026-11553 · Severity: high · CVSS 8.8 · Published 2026-06-08

A vulnerability exists in several Tenda router models (HG7, HG9, and HG10) used for fiber-optic internet connections. An attacker can exploit this flaw to crash the device's management interface or potentially take full control of the router. This could lead to a complete loss of internet connectivity for the user or unauthorized access to network traffic.

Technologies: Tenda HG10 AC1200 Dual-Band Wi-Fi xPON ONT, Tenda HG7, Tenda HG9. Vendors: Tenda.

Quick answers

Is CVE-2026-11553 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-11553 being exploited in the wild.
How severe is CVE-2026-11553?: High severity, with a CVSS score of 8.8, published 8 June 2026.
Which products and versions are affected?: Tenda HG10 AC1200 Dual-Band Wi-Fi xPON ONT 300001138_en_xpon; Tenda HG7 300001138_en_xpon; Tenda HG9 300001138_en_xpon.
Is there a fix for CVE-2026-11553?: 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-2026-11553 attacked?: It is attacked over the network, in an operating system.
Am I affected by CVE-2026-11553?: Check whether you run Tenda HG10 AC1200 Dual-Band Wi-Fi xPON ONT, Tenda HG7 or Tenda HG9 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 (CWE-121) exists in the Tenda HG7, HG9, and HG10 router firmware (version 300001138_en_xpon). The vulnerability is located in the 'formPPPEdit' function within the '/boaform/formPPPEdit' component. It is triggered by providing an overly long string to the 'encodename' parameter. While some reports suggest low privileges are required, others indicate it may be unauthenticated. Successful exploitation allows an attacker to crash the Boa web service (Denial of Service) or achieve arbitrary code execution with root privileges. A public exploit has been disclosed.

Affected products

Tenda HG7 300001138_en_xpon
Tenda HG9 300001138_en_xpon
Tenda HG10 AC1200 Dual-Band Wi-Fi xPON ONT 300001138_en_xpon

Timeline

2026-06-08: disclosed: Vulnerability disclosed and CVE assigned
2026-06-08: advisory: NVD and VulDB published advisory details

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.