CVE-2026-5685: Stack-based Buffer Overflow in Tenda CX12L
CVE-2026-5685 is a high-severity stack-based buffer overflow vulnerability in the Tenda CX12L router firmware version 16. 03. 53. 12. The flaw exists in the fromAddressNat function within the /goform/addressNat file, where improper handling of the 'page' argument allows remote attackers to trigger a buffer overflow. Exploitation can be performed remotely without user interaction and requires low attack complexity. Although an exploit is publicly available, there are no confirmed reports of exploitation in the wild. No official patch or remediation guidance has been provided by the vendor as of the publication date.
AI Analysis
Technical Summary
The vulnerability CVE-2026-5685 affects Tenda CX12L firmware 16.03.53.12. It is a stack-based buffer overflow caused by improper validation of the 'page' argument in the fromAddressNat function located in /goform/addressNat. This flaw allows remote attackers to overflow the stack, potentially leading to arbitrary code execution or denial of service. The vulnerability has a CVSS 4.0 base score of 8.7, indicating high severity with network attack vector, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. Exploit code is publicly available, but no vendor patch or official remediation has been documented.
Potential Impact
Successful exploitation of this vulnerability can lead to remote code execution or denial of service on affected Tenda CX12L devices. The attacker can initiate the attack remotely without authentication or user interaction. The high CVSS score reflects significant potential impact on device confidentiality, integrity, and availability. However, there are no confirmed reports of active exploitation in the wild at this time.
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 limiting network exposure of the affected device, such as restricting remote access to trusted networks only. Monitor vendor communications for updates on patches or official mitigations. Avoid using the vulnerable firmware version 16.03.53.12 if possible.
CVE-2026-5685: Stack-based Buffer Overflow in Tenda CX12L
Description
CVE-2026-5685 is a high-severity stack-based buffer overflow vulnerability in the Tenda CX12L router firmware version 16. 03. 53. 12. The flaw exists in the fromAddressNat function within the /goform/addressNat file, where improper handling of the 'page' argument allows remote attackers to trigger a buffer overflow. Exploitation can be performed remotely without user interaction and requires low attack complexity. Although an exploit is publicly available, there are no confirmed reports of exploitation in the wild. No official patch or remediation guidance has been provided by the vendor as of the publication date.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-5685 affects Tenda CX12L firmware 16.03.53.12. It is a stack-based buffer overflow caused by improper validation of the 'page' argument in the fromAddressNat function located in /goform/addressNat. This flaw allows remote attackers to overflow the stack, potentially leading to arbitrary code execution or denial of service. The vulnerability has a CVSS 4.0 base score of 8.7, indicating high severity with network attack vector, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. Exploit code is publicly available, but no vendor patch or official remediation has been documented.
Potential Impact
Successful exploitation of this vulnerability can lead to remote code execution or denial of service on affected Tenda CX12L devices. The attacker can initiate the attack remotely without authentication or user interaction. The high CVSS score reflects significant potential impact on device confidentiality, integrity, and availability. However, there are no confirmed reports of active exploitation in the wild at this time.
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 limiting network exposure of the affected device, such as restricting remote access to trusted networks only. Monitor vendor communications for updates on patches or official mitigations. Avoid using the vulnerable firmware version 16.03.53.12 if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-04-06T10:14:10.085Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d4297c0a160ebd92e00940
Added to database: 4/6/2026, 9:45:32 PM
Last enriched: 4/6/2026, 10:00:46 PM
Last updated: 4/7/2026, 3:24:24 AM
Views: 7
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