CVE-2025-11091: Tenda AC21 SetStaticRouteCfg sscanf buffer overflow

Published Sep 28, 2025
·
Updated

A security flaw has been discovered in Tenda AC21 up to 16.03.08.16. Affected by this vulnerability is the function sscanf of the file /goform/SetStaticRouteCfg. The manipulation of the argument list results in buffer overflow. The attack can be launched remotely. The exploit has been released to the public and may be exploited.

Affected Software

3 affected components
Tenda AC21<=16.03.08.16
All of the following
Tenda Ac21 Firmware<=16.03.08.16
Tenda AC21

Event History

Sep 28, 2025
CVE Published
via MITRE·01:32 AM
Data Sourced
via MITRE·01:32 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·02:15 AM
DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2025-11091?

CVE-2025-11091 is classified as a high-severity vulnerability due to its potential for remote exploitation through a buffer overflow.

2

How do I fix CVE-2025-11091?

To fix CVE-2025-11091, upgrade the Tenda AC21 firmware to a version beyond 16.03.08.16.

3

What systems are affected by CVE-2025-11091?

CVE-2025-11091 affects Tenda AC21 devices running firmware versions up to and including 16.03.08.16.

4

Can CVE-2025-11091 be exploited remotely?

Yes, CVE-2025-11091 can be exploited remotely, allowing attackers to execute malicious code on vulnerable devices.

5

What kind of attack can CVE-2025-11091 facilitate?

CVE-2025-11091 can facilitate a buffer overflow attack, which may lead to arbitrary code execution on the affected devices.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203