CVE-2026-5687: Stack-based Buffer Overflow in Tenda CX12L
A stack-based buffer overflow vulnerability exists in the Tenda CX12L router firmware version 16. 03. 53. 12, specifically in the fromNatStaticSetting function handling the /goform/NatStaticSetting endpoint. This flaw can be triggered remotely by manipulating the 'page' argument, potentially allowing an attacker to execute arbitrary code or cause a denial of service. The vulnerability has a high severity rating with a CVSS score of 8. 7. Although an exploit is publicly available, there is no confirmed patch or official remediation at this time.
AI Analysis
Technical Summary
CVE-2026-5687 is a stack-based buffer overflow vulnerability in Tenda CX12L firmware version 16.03.53.12. The issue arises from improper handling of the 'page' argument in the fromNatStaticSetting function within the /goform/NatStaticSetting file. This vulnerability can be exploited remotely without user interaction or privileges, leading to potential arbitrary code execution or service disruption. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. No official patch or remediation guidance has been published by the vendor.
Potential Impact
Successful exploitation of this vulnerability may allow remote attackers to execute arbitrary code on the affected device or cause a denial of service by triggering a stack-based buffer overflow. This can compromise the confidentiality, integrity, and availability of the device and potentially the network it serves. The high CVSS score of 8.7 reflects the significant risk posed by this vulnerability.
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 and monitor for unusual activity. No vendor-provided mitigation or temporary fix is currently documented.
CVE-2026-5687: Stack-based Buffer Overflow in Tenda CX12L
Description
A stack-based buffer overflow vulnerability exists in the Tenda CX12L router firmware version 16. 03. 53. 12, specifically in the fromNatStaticSetting function handling the /goform/NatStaticSetting endpoint. This flaw can be triggered remotely by manipulating the 'page' argument, potentially allowing an attacker to execute arbitrary code or cause a denial of service. The vulnerability has a high severity rating with a CVSS score of 8. 7. Although an exploit is publicly available, there is no confirmed patch or official remediation at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-5687 is a stack-based buffer overflow vulnerability in Tenda CX12L firmware version 16.03.53.12. The issue arises from improper handling of the 'page' argument in the fromNatStaticSetting function within the /goform/NatStaticSetting file. This vulnerability can be exploited remotely without user interaction or privileges, leading to potential arbitrary code execution or service disruption. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. No official patch or remediation guidance has been published by the vendor.
Potential Impact
Successful exploitation of this vulnerability may allow remote attackers to execute arbitrary code on the affected device or cause a denial of service by triggering a stack-based buffer overflow. This can compromise the confidentiality, integrity, and availability of the device and potentially the network it serves. The high CVSS score of 8.7 reflects the significant risk posed by this vulnerability.
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 and monitor for unusual activity. No vendor-provided mitigation or temporary fix is currently documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-04-06T10:14:16.523Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d430940a160ebd92e2809b
Added to database: 4/6/2026, 10:15:48 PM
Last enriched: 4/14/2026, 4:12:23 PM
Last updated: 5/22/2026, 8:30:41 PM
Views: 69
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.