CVE-2026-19790: Stack-based Buffer Overflow in Tenda G0
A stack-based buffer overflow vulnerability exists in the Tenda G0 device up to version 20260625 in the httpd Web Management Interface component. The flaw is triggered by manipulating the portMirrorMirroredPorts argument in the formSetPortMirror function. This vulnerability can be exploited remotely without user interaction. Public exploit code is available, increasing the risk of exploitation. The vulnerability has a high severity rating with significant impact on confidentiality, integrity, and availability.
AI Analysis
Technical Summary
CVE-2026-19790 is a stack-based buffer overflow vulnerability in the Tenda G0 device's httpd Web Management Interface, specifically in the formSetPortMirror function within the /goform/module component. The vulnerability arises from improper handling of the portMirrorMirroredPorts argument, allowing remote attackers to cause a buffer overflow. Exploitation requires low privileges and no user interaction. Public exploit code exists, but no known active exploitation in the wild has been reported. The CVSS 3.1 base score is 8.8, reflecting high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation of this vulnerability can lead to remote code execution or denial of service on the affected device, compromising confidentiality, integrity, and availability. The vulnerability can be triggered remotely with low attack complexity and no user interaction, making it a significant risk if exploited.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the device's web management interface to trusted networks and users. Monitor vendor communications for updates regarding patches or mitigations.
CVE-2026-19790: Stack-based Buffer Overflow in Tenda G0
Description
A stack-based buffer overflow vulnerability exists in the Tenda G0 device up to version 20260625 in the httpd Web Management Interface component. The flaw is triggered by manipulating the portMirrorMirroredPorts argument in the formSetPortMirror function. This vulnerability can be exploited remotely without user interaction. Public exploit code is available, increasing the risk of exploitation. The vulnerability has a high severity rating with significant impact on confidentiality, integrity, and availability.
CVSS v4.0
Score 8.7high
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-19790 is a stack-based buffer overflow vulnerability in the Tenda G0 device's httpd Web Management Interface, specifically in the formSetPortMirror function within the /goform/module component. The vulnerability arises from improper handling of the portMirrorMirroredPorts argument, allowing remote attackers to cause a buffer overflow. Exploitation requires low privileges and no user interaction. Public exploit code exists, but no known active exploitation in the wild has been reported. The CVSS 3.1 base score is 8.8, reflecting high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation of this vulnerability can lead to remote code execution or denial of service on the affected device, compromising confidentiality, integrity, and availability. The vulnerability can be triggered remotely with low attack complexity and no user interaction, making it a significant risk if exploited.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the device's web management interface to trusted networks and users. Monitor vendor communications for updates regarding patches or mitigations.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-hrjq-f2xj-8982
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-19790"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a7f440cbf8831d5395fb6d4
Added to database: 08/14/2026, 16:36:28 UTC
Last enriched: 08/14/2026, 16:58:54 UTC
Last updated: 08/14/2026, 22:40:59 UTC
Views: 4
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