CVE-2026-5686: Stack-based Buffer Overflow in Tenda CX12L
CVE-2026-5686 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 fromRouteStatic function within the /goform/RouteStatic file, where improper handling of the 'page' argument allows remote attackers to cause a buffer overflow. This vulnerability can be exploited remotely without user interaction and requires low attack complexity and privileges. Although an exploit has been publicly released, there is no official patch or remediation guidance available from the vendor at this time.
AI Analysis
Technical Summary
The Tenda CX12L router firmware version 16.03.53.12 contains a stack-based buffer overflow vulnerability in the fromRouteStatic function of the /goform/RouteStatic endpoint. This vulnerability arises from improper validation or handling of the 'page' argument, enabling remote attackers to overflow the stack buffer. The vulnerability has a CVSS 4.0 base score of 8.7, indicating high severity with network attack vector, low complexity, no user interaction, and high impact on confidentiality, integrity, and availability. No official patch or vendor advisory is currently available, and public exploit code exists.
Potential Impact
Successful exploitation of this vulnerability can lead to remote code execution or denial of service on the affected Tenda CX12L device, compromising the device's confidentiality, integrity, and availability. Given the high CVSS score and remote attack vector, attackers can potentially take control of the device or disrupt its operation without requiring user interaction or elevated privileges.
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 the management interface. Monitor vendor communications for updates on patches or official mitigations. No vendor advisory or official fix is currently available.
CVE-2026-5686: Stack-based Buffer Overflow in Tenda CX12L
Description
CVE-2026-5686 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 fromRouteStatic function within the /goform/RouteStatic file, where improper handling of the 'page' argument allows remote attackers to cause a buffer overflow. This vulnerability can be exploited remotely without user interaction and requires low attack complexity and privileges. Although an exploit has been publicly released, there is no official patch or remediation guidance available from the vendor at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Tenda CX12L router firmware version 16.03.53.12 contains a stack-based buffer overflow vulnerability in the fromRouteStatic function of the /goform/RouteStatic endpoint. This vulnerability arises from improper validation or handling of the 'page' argument, enabling remote attackers to overflow the stack buffer. The vulnerability has a CVSS 4.0 base score of 8.7, indicating high severity with network attack vector, low complexity, no user interaction, and high impact on confidentiality, integrity, and availability. No official patch or vendor advisory is currently available, and public exploit code exists.
Potential Impact
Successful exploitation of this vulnerability can lead to remote code execution or denial of service on the affected Tenda CX12L device, compromising the device's confidentiality, integrity, and availability. Given the high CVSS score and remote attack vector, attackers can potentially take control of the device or disrupt its operation without requiring user interaction or elevated privileges.
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 the management interface. Monitor vendor communications for updates on patches or official mitigations. No vendor advisory or official fix is currently available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-04-06T10:14:13.187Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d42d0d0a160ebd92e15bdb
Added to database: 4/6/2026, 10:00:45 PM
Last enriched: 4/14/2026, 3:57:13 PM
Last updated: 5/22/2026, 3:26:42 AM
Views: 74
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