CVE-2026-19821: Tenda AC12 httpd web management interface SetSysAutoRebbotCfg formSetRebootTimer buffer overflow

Published Aug 14, 2026
·
Updated

A vulnerability was determined in Tenda AC12 15.03.06.23multiTD01. This vulnerability affects the function formSetRebootTimer of the file /goform/SetSysAutoRebbotCfg of the component httpd web management interface. This manipulation of the argument rebootTime causes buffer overflow. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized.

Affected Software

1 affected component
Tenda AC12 httpd web management interface=15.03.06.23_multi_TD01

Event History

Aug 14, 2026
CVE Published
via MITRE·11:00 AM
Data Sourced
via MITRE·11:00 AM
DescriptionSeverityWeakness
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of CVE-2026-19821?

CVE-2026-19821 has a high severity rating of 8.8.

2

What type of vulnerability is CVE-2026-19821?

CVE-2026-19821 is classified as a buffer overflow vulnerability.

3

How do I fix CVE-2026-19821?

To mitigate CVE-2026-19821, update your Tenda AC12 firmware to the latest version provided by the vendor.

4

What component is affected by CVE-2026-19821?

CVE-2026-19821 affects the httpd web management interface of the Tenda AC12.

5

What does CVE-2026-19821 allow an attacker to do?

CVE-2026-19821 allows an attacker to exploit a buffer overflow vulnerability through the formSetRebootTimer function.

Company

Resources

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
CVE-2026-19821 - Tenda AC12 httpd web management interface SetSysAutoRebbotCfg formSetRebootTimer buffer overflow - SecAlerts