CVE-2026-9429: Stack-based Buffer Overflow in Tenda F1202
CVE-2026-9429 is a high-severity stack-based buffer overflow vulnerability in the Tenda F1202 router firmware version 1.2.0.20(408). The flaw exists in the formWrlExtraSet function within the /goform/WrlExtraSet endpoint, where manipulation of the delno argument can trigger the overflow. This vulnerability can be exploited remotely without user interaction and requires low attack complexity and privileges. Although an exploit has been publicly disclosed, there are no confirmed reports of exploitation in the wild. No official patch or remediation guidance is currently available from the vendor.
AI Analysis
Technical Summary
The vulnerability CVE-2026-9429 affects Tenda F1202 firmware version 1.2.0.20(408). It is a stack-based buffer overflow triggered by improper handling of the delno argument in the formWrlExtraSet function of the /goform/WrlExtraSet file. The flaw allows remote attackers to cause memory corruption, potentially leading to arbitrary code execution or denial of service. The CVSS 4.0 base score is 8.7, reflecting high severity with network attack vector, low complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. No official patch or vendor advisory is currently available, and the device is not a cloud service.
Potential Impact
Successful exploitation of this vulnerability can lead to memory corruption on the affected device, potentially allowing remote attackers to execute arbitrary code or cause denial of service. The vulnerability impacts confidentiality, integrity, and availability of the device. No confirmed exploitation in the wild has been reported, but a public exploit exists.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider restricting network access to the affected device's management interface to trusted sources only. Monitor for any updates from Tenda regarding patches or mitigations. Avoid exposing the device management interface to untrusted networks.
CVE-2026-9429: Stack-based Buffer Overflow in Tenda F1202
Description
CVE-2026-9429 is a high-severity stack-based buffer overflow vulnerability in the Tenda F1202 router firmware version 1.2.0.20(408). The flaw exists in the formWrlExtraSet function within the /goform/WrlExtraSet endpoint, where manipulation of the delno argument can trigger the overflow. This vulnerability can be exploited remotely without user interaction and requires low attack complexity and privileges. Although an exploit has been publicly disclosed, there are no confirmed reports of exploitation in the wild. No official patch or remediation guidance is currently available from the vendor.
CVSS v4.0
Score 8.7high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-9429 affects Tenda F1202 firmware version 1.2.0.20(408). It is a stack-based buffer overflow triggered by improper handling of the delno argument in the formWrlExtraSet function of the /goform/WrlExtraSet file. The flaw allows remote attackers to cause memory corruption, potentially leading to arbitrary code execution or denial of service. The CVSS 4.0 base score is 8.7, reflecting high severity with network attack vector, low complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. No official patch or vendor advisory is currently available, and the device is not a cloud service.
Potential Impact
Successful exploitation of this vulnerability can lead to memory corruption on the affected device, potentially allowing remote attackers to execute arbitrary code or cause denial of service. The vulnerability impacts confidentiality, integrity, and availability of the device. No confirmed exploitation in the wild has been reported, but a public exploit exists.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider restricting network access to the affected device's management interface to trusted sources only. Monitor for any updates from Tenda regarding patches or mitigations. Avoid exposing the device management interface to untrusted networks.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-05-24T07:03:22.153Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a13eec0a5ae1af1aa6777bb
Added to database: 05/25/2026, 06:40:00 UTC
Last enriched: 06/01/2026, 20:50:39 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 96
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