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 of the /goform/RouteStatic file, where improper handling of the 'page' argument allows remote attackers to trigger a buffer overflow. This vulnerability can be exploited remotely without user interaction and requires low attack complexity. Although an exploit has been publicly released, 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-2026-5686 affects Tenda CX12L firmware 16.03.53.12 and involves a stack-based buffer overflow in the fromRouteStatic function within /goform/RouteStatic. Remote attackers can manipulate the 'page' parameter to overflow the stack buffer, potentially leading to code execution or denial of service. The CVSS 4.0 base score is 8.7, reflecting high severity with network attack vector, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. The vulnerability is publicly known and exploitable remotely, but no official patch or mitigation has been documented.
Potential Impact
Successful exploitation of this vulnerability could allow remote attackers to execute arbitrary code or cause a denial of service on affected Tenda CX12L devices. The high CVSS score indicates significant impact on confidentiality, integrity, and availability. The vulnerability requires no user interaction and low attack complexity, increasing the risk of exploitation. 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. Since no official fix or workaround has been provided, users should monitor Tenda's official channels for updates. Until a patch is available, restricting remote access to the device's management interface and applying network-level protections may reduce exposure.
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 of the /goform/RouteStatic file, where improper handling of the 'page' argument allows remote attackers to trigger a buffer overflow. This vulnerability can be exploited remotely without user interaction and requires low attack complexity. Although an exploit has been publicly released, 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-2026-5686 affects Tenda CX12L firmware 16.03.53.12 and involves a stack-based buffer overflow in the fromRouteStatic function within /goform/RouteStatic. Remote attackers can manipulate the 'page' parameter to overflow the stack buffer, potentially leading to code execution or denial of service. The CVSS 4.0 base score is 8.7, reflecting high severity with network attack vector, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. The vulnerability is publicly known and exploitable remotely, but no official patch or mitigation has been documented.
Potential Impact
Successful exploitation of this vulnerability could allow remote attackers to execute arbitrary code or cause a denial of service on affected Tenda CX12L devices. The high CVSS score indicates significant impact on confidentiality, integrity, and availability. The vulnerability requires no user interaction and low attack complexity, increasing the risk of exploitation. 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. Since no official fix or workaround has been provided, users should monitor Tenda's official channels for updates. Until a patch is available, restricting remote access to the device's management interface and applying network-level protections may reduce exposure.
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: 4/6/2026, 10:15:26 PM
Last updated: 4/7/2026, 12:08:47 AM
Views: 6
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