A stack-based buffer overflow vulnerability exists in the boa formUploadFile functionality of X2000R (version(s):… (CVE-2026-9817)
Description
A stack-based buffer overflow vulnerability exists in the boa formUploadFile functionality of the TOTOLINK X2000R device firmware version TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327. This vulnerability can be triggered by an authenticated HTTP request with specially crafted data, potentially allowing arbitrary code execution. The vulnerability is rated critical with a CVSS score of 9.1.
CVSS v3.1
Score 9.1critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-9817 describes a stack-based buffer overflow in the formUploadFile functionality of the boa web server component on TOTOLINK X2000R firmware version TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327. An attacker with authentication privileges can send a specially crafted HTTP request that triggers this overflow, leading to potential arbitrary code execution. The vulnerability is classified under CWE-121 (stack-based buffer overflow) and has a high severity impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows an authenticated attacker to execute arbitrary code on the affected device, compromising confidentiality, integrity, and availability. This could lead to full system compromise or disruption of device functionality.
Mitigation Recommendations
No patch or official fix information is currently provided. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict authenticated access to the device's web interface and monitor for suspicious activity related to form uploads.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-4x89-c5gq-3rg8
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-9817"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
Threat ID: 6ad7ec102cdf04f6566aefae
Added to database: 10/20/2026, 22:32:48 UTC
Last enriched: 10/20/2026, 22:35:15 UTC
Last updated: 10/21/2026, 00:08:25 UTC
Views: 4
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