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. It occurs in the fromAddressNat function within the /goform/addressNat file due to improper handling of the 'page' argument. This vulnerability can be exploited remotely without user interaction and has a CVSS 4. 0 base score of 8. 7. Although an exploit is publicly available, there is no confirmed information about active 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 version 16.03.53.12. It is a stack-based buffer overflow triggered by manipulating the 'page' argument in the fromAddressNat function located in the /goform/addressNat endpoint. This flaw allows remote attackers to potentially execute arbitrary code or cause a denial of service. The vulnerability requires no user interaction and has low attack complexity. The CVSS 4.0 vector indicates network attack vector, no privileges required, and high impact on confidentiality, integrity, and availability. No official patch or remediation level has been disclosed by Tenda, and the device is not a cloud service, so remediation depends on vendor firmware updates.
Potential Impact
Successful exploitation of this vulnerability can lead to remote code execution or denial of service on affected Tenda CX12L devices running firmware version 16.03.53.12. The vulnerability impacts confidentiality, integrity, and availability with high severity. There is no confirmed evidence of 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 available, users should consider restricting network access to the vulnerable device's management interfaces to trusted networks only and monitor for unusual device behavior. Avoid exposing the device management interface to untrusted networks. Follow vendor channels for firmware updates addressing this vulnerability.
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. It occurs in the fromAddressNat function within the /goform/addressNat file due to improper handling of the 'page' argument. This vulnerability can be exploited remotely without user interaction and has a CVSS 4. 0 base score of 8. 7. Although an exploit is publicly available, there is no confirmed information about active 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 version 16.03.53.12. It is a stack-based buffer overflow triggered by manipulating the 'page' argument in the fromAddressNat function located in the /goform/addressNat endpoint. This flaw allows remote attackers to potentially execute arbitrary code or cause a denial of service. The vulnerability requires no user interaction and has low attack complexity. The CVSS 4.0 vector indicates network attack vector, no privileges required, and high impact on confidentiality, integrity, and availability. No official patch or remediation level has been disclosed by Tenda, and the device is not a cloud service, so remediation depends on vendor firmware updates.
Potential Impact
Successful exploitation of this vulnerability can lead to remote code execution or denial of service on affected Tenda CX12L devices running firmware version 16.03.53.12. The vulnerability impacts confidentiality, integrity, and availability with high severity. There is no confirmed evidence of 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 available, users should consider restricting network access to the vulnerable device's management interfaces to trusted networks only and monitor for unusual device behavior. Avoid exposing the device management interface to untrusted networks. Follow vendor channels for firmware updates addressing this vulnerability.
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: 4/14/2026, 4:02:20 PM
Last updated: 5/22/2026, 4:32:29 AM
Views: 64
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