CVE-2026-19789
Received Received - Intake

Stack-Based Buffer Overflow in Tenda AC1206 Router

Publication date: 2026-08-14

Last updated on: 2026-08-14

Assigner: VulDB

Description
A vulnerability was determined in Tenda AC1206 15.03.06.23_multi_TD01. This vulnerability affects the function set_wl_guest_iplist of the file /goform/WifiGuestSet of the component httpd web management interface. This manipulation of the argument shareSpeed causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized.

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Meta Information

Published
2026-08-14
Last Modified
2026-08-14
Generated
2026-08-14
AI Q&A
2026-08-14
EPSS Evaluated
N/A
NVD
CVE-2026-19789
EUVD
EUVD-2026-58574

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
tenda ac1206 15.03.06.23_multi_td01
tenda ac12 15.03.06.23_multi_td01

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Attack-Flow Graph

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Executive Summary

This is a stack-based buffer overflow vulnerability in the Tenda AC1206 router's httpd web management interface. It occurs in the function set_wl_guest_iplist when processing the shareSpeed argument via the /goform/WifiGuestSet endpoint. The flaw allows remote attackers to overflow a fixed-size stack buffer by providing a maliciously crafted shareSpeed value, potentially leading to arbitrary code execution or system crashes.

Detection Guidance

To detect this vulnerability, check if your Tenda AC1206 router is running firmware version 15.03.06.23_multi_TD01 or similar. Inspect network traffic for requests to the /goform/WifiGuestSet endpoint with the shareSpeed parameter. Use tools like Wireshark to capture and analyze HTTP POST requests targeting this path.

Impact Analysis

An attacker could exploit this to execute arbitrary code on the router, gaining control over the device. This might allow network monitoring, data interception, or turning the router into a botnet node. Users could experience device instability or complete failure, disrupting internet access.

Compliance Impact

This vulnerability, a stack-based buffer overflow in Tenda AC1206's httpd web management interface, could lead to arbitrary code execution or denial of service. Such flaws may violate compliance requirements under GDPR (data protection) and HIPAA (health data security) by enabling unauthorized access to sensitive information or disrupting critical services.

Mitigation Strategies

Immediately update the router firmware to the latest version provided by Tenda. Disable the httpd web management interface if not required. Restrict access to the router's admin panel via firewall rules to trusted IP addresses only. Monitor network traffic for suspicious activity targeting the /goform/WifiGuestSet endpoint.

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