CVE-2025-14655

Unknown Unknown - Not Provided

BaseFortify

Publication date: 2025-12-14

Last updated on: 2026-02-24

Assigner: VulDB

Description

A security flaw has been discovered in Tenda AC20 16.03.08.12. The impacted element is the function formSetRebootTimer of the file /goform/SetSysAutoRebbotCfg of the component httpd. Performing a manipulation of the argument rebootTime results in stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2025-12-14

Last Modified

2026-02-24

Generated

2026-07-06

AI Q&A

2025-12-14

EPSS Evaluated

2026-07-05

NVD

CVE-2025-14655

Affected Vendors & Products

Vendor	Product	Version / Range
tenda	ac20_firmware	16.03.08.12
tenda	ac20	*

Helpful Resources

Exploitability

CWE

KEV

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.
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability is a stack-based buffer overflow in the Tenda AC20 router firmware version 16.03.08.12. It occurs in the function formSetRebootTimer within the /goform/SetSysAutoRebbotCfg endpoint of the httpd component. By manipulating the rebootTime parameter with crafted input, an attacker can overflow the stack buffer. This flaw allows remote attackers to potentially cause denial-of-service or execute arbitrary commands on the device without authentication. [1, 2]

Impact Analysis

Exploitation of this vulnerability can impact the confidentiality, integrity, and availability of the affected device. An attacker can remotely cause denial-of-service conditions or execute arbitrary commands, potentially taking full control of the router. This can disrupt network operations and compromise sensitive data passing through the device. [1, 2]

Detection Guidance

Detection can be performed by monitoring HTTP requests to the /goform/SetSysAutoRebbotCfg endpoint on Tenda AC20 routers running firmware version 16.03.08.12, specifically looking for suspicious or unusually large rebootTime parameter values that could trigger the stack-based buffer overflow. Network intrusion detection systems (NIDS) can be configured to alert on such requests. Additionally, reviewing logs for unexpected reboots or crashes may indicate exploitation attempts. Specific commands are not provided in the resources. [1, 2]

Mitigation Strategies

Immediate mitigation steps include replacing the affected Tenda AC20 router firmware version 16.03.08.12 with an alternative or updated version if available, as no known countermeasures or patches exist. Limiting remote access to the device and restricting HTTP access to trusted networks may reduce exposure. Monitoring for exploitation attempts and disabling the vulnerable service if possible are also recommended. [2]

Hi! I’m here to help you understand CVE-2025-14655. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70