CVE-2026-5155: Stack-based Buffer Overflow in Tenda CH22
A vulnerability was found in Tenda CH22 1.0.0.1. This affects the function fromAdvSetWan of the file /goform/AdvSetWan of the component Parameter Handler. The manipulation of the argument wanmode results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been made public and could be used.
AI Analysis
Technical Summary
The vulnerability CVE-2026-5155 affects Tenda CH22 firmware version 1.0.0.1. It is a stack-based buffer overflow triggered by improper handling of the wanmode argument in the fromAdvSetWan function of the /goform/AdvSetWan parameter handler. The flaw allows remote attackers to overflow the stack, potentially leading to arbitrary code execution or device disruption. The CVSS 4.0 base score is 8.7, indicating high severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. Exploit code is publicly available, but no vendor patch or official fix has been documented.
Potential Impact
Successful exploitation of this vulnerability can lead to remote code execution or denial of service on the affected Tenda CH22 device. The attacker can manipulate the wanmode parameter remotely without authentication or user interaction. This compromises the confidentiality, integrity, and availability of the device and potentially the network it serves. The public availability of exploit code increases the likelihood of attacks.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider restricting network access to the device's management interface to trusted sources only and monitor for suspicious activity. No vendor-provided official fix or temporary workaround is currently documented.
CVE-2026-5155: Stack-based Buffer Overflow in Tenda CH22
Description
A vulnerability was found in Tenda CH22 1.0.0.1. This affects the function fromAdvSetWan of the file /goform/AdvSetWan of the component Parameter Handler. The manipulation of the argument wanmode results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been made public and could be used.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-5155 affects Tenda CH22 firmware version 1.0.0.1. It is a stack-based buffer overflow triggered by improper handling of the wanmode argument in the fromAdvSetWan function of the /goform/AdvSetWan parameter handler. The flaw allows remote attackers to overflow the stack, potentially leading to arbitrary code execution or device disruption. The CVSS 4.0 base score is 8.7, indicating high severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. Exploit code is publicly available, but no vendor patch or official fix has been documented.
Potential Impact
Successful exploitation of this vulnerability can lead to remote code execution or denial of service on the affected Tenda CH22 device. The attacker can manipulate the wanmode parameter remotely without authentication or user interaction. This compromises the confidentiality, integrity, and availability of the device and potentially the network it serves. The public availability of exploit code increases the likelihood of attacks.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider restricting network access to the device's management interface to trusted sources only and monitor for suspicious activity. No vendor-provided official fix or temporary workaround is currently documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-03-30T13:33:12.593Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 69cafedde6bfc5ba1d798140
Added to database: 3/30/2026, 10:53:17 PM
Last enriched: 4/7/2026, 6:38:17 AM
Last updated: 5/15/2026, 3:53:30 AM
Views: 82
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