CVE-2026-6015: Stack-based Buffer Overflow in Tenda AC9
CVE-2026-6015 is a high-severity stack-based buffer overflow vulnerability in the Tenda AC9 router firmware version 15. 03. 02. 13. The flaw exists in the formQuickIndex function handling the /goform/QuickIndex POST request, where manipulation of the PPPOEPassword argument can trigger the overflow. This vulnerability can be exploited remotely without user interaction. Although the exploit details have been publicly disclosed, there is no confirmed patch or official remediation available at this time.
AI Analysis
Technical Summary
This vulnerability affects Tenda AC9 firmware version 15.03.02.13. The issue lies in the POST Request Handler component, specifically the formQuickIndex function in the /goform/QuickIndex endpoint. By sending a specially crafted argument in PPPOEPassword, an attacker can cause a stack-based buffer overflow. This overflow may allow remote 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, low attack complexity, no privileges required, and no user interaction needed. No official fix or patch has been published by the vendor as of the data provided.
Potential Impact
Successful exploitation of this vulnerability can lead to remote code execution or denial of service on the affected Tenda AC9 device. The attacker can trigger the overflow remotely without authentication or user interaction, potentially compromising device integrity and availability. The high CVSS score reflects the significant risk posed by this flaw.
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 access to the management interface from untrusted networks. Monitor vendor channels for updates and apply patches promptly once available.
CVE-2026-6015: Stack-based Buffer Overflow in Tenda AC9
Description
CVE-2026-6015 is a high-severity stack-based buffer overflow vulnerability in the Tenda AC9 router firmware version 15. 03. 02. 13. The flaw exists in the formQuickIndex function handling the /goform/QuickIndex POST request, where manipulation of the PPPOEPassword argument can trigger the overflow. This vulnerability can be exploited remotely without user interaction. Although the exploit details have been publicly disclosed, there is no confirmed patch or official remediation available at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects Tenda AC9 firmware version 15.03.02.13. The issue lies in the POST Request Handler component, specifically the formQuickIndex function in the /goform/QuickIndex endpoint. By sending a specially crafted argument in PPPOEPassword, an attacker can cause a stack-based buffer overflow. This overflow may allow remote 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, low attack complexity, no privileges required, and no user interaction needed. No official fix or patch has been published by the vendor as of the data provided.
Potential Impact
Successful exploitation of this vulnerability can lead to remote code execution or denial of service on the affected Tenda AC9 device. The attacker can trigger the overflow remotely without authentication or user interaction, potentially compromising device integrity and availability. The high CVSS score reflects the significant risk posed by this flaw.
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 access to the management interface from untrusted networks. Monitor vendor channels for updates and apply patches promptly once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-04-09T14:36:50.168Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d8c0ed1cc7ad14daa3537b
Added to database: 4/10/2026, 9:20:45 AM
Last enriched: 4/10/2026, 9:35:55 AM
Last updated: 4/11/2026, 3:21:53 AM
Views: 13
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