CVE-2022-30040

HIGH

Tenda AX1803 v1.0.0.1_2890 - Buffer Overflow via NTP Server Parameter in SetSysTimeCfg

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2022-30040. PoCs published by Le1a.

AI-analyzed exploit summary This repository contains a proof-of-concept for CVE-2022-30040, a stack buffer overflow vulnerability in Tenda AX1803 v1.0.0.1_2890 routers. The exploit leverages an unbounded strcpy operation in the fromSetSysTime function, allowing attackers to overflow the buffer via the ntpserver parameter, leading to a denial-of-service (DoS) condition.

Description

Tenda AX1803 v1.0.0.1_2890 is vulnerable to Buffer Overflow. The vulnerability lies in rootfs_ In / goform / setsystimecfg of / bin / tdhttpd in ubif file system, attackers can access http://ip/goform/SetSysTimeCfg, and by setting the ntpserve parameter, the stack buffer overflow can be caused to achieve the effect of router denial of service.

Exploits (1)

nomisec WORKING POC
by Le1a · poc
https://github.com/Le1a/CVE-2022-30040

This repository contains a proof-of-concept for CVE-2022-30040, a stack buffer overflow vulnerability in Tenda AX1803 v1.0.0.1_2890 routers. The exploit leverages an unbounded strcpy operation in the fromSetSysTime function, allowing attackers to overflow the buffer via the ntpserver parameter, leading to a denial-of-service (DoS) condition.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Tenda AX1803 v1.0.0.1_2890
Auth required
Prerequisites: Access to the router's web interface · Valid authentication credentials
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2
Core References
Exploit, Third Party Advisory x_refsource_misc
https://github.com/Le1a/Tenda-AX1803-Denial-of-service
Exploit, Third Party Advisory x_refsource_misc
https://github.com/Le1a/CVE-2022-30040

Scores

CVSS v3 7.5
EPSS 0.0184
EPSS Percentile 76.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-787
Status published
Products (1)
tenda/ax1803_firmware 1.0.0.1_2890
Published May 11, 2022
Tracked Since Feb 18, 2026