A vulnerability was found in TOTOLINK NR1800X 9.1.0u.6681_B20230703. (CVE-2026-82616)
Description
A stack-based buffer overflow vulnerability exists in the TOTOLINK NR1800X firmware version 9.1.0u.6681_B20230703 in the setUploadSetting function of /cgi-bin/cstecgi.cgi. This vulnerability can be exploited remotely by manipulating the FileName argument. The vulnerability has a high severity score of 9.9 and an exploit has been publicly disclosed, though no known exploits are reported in the wild.
CVSS v3.1
Score 9.9critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-82616 describes a stack-based buffer overflow vulnerability in the TOTOLINK NR1800X router firmware version 9.1.0u.6681_B20230703. The flaw is located in the setUploadSetting function within the /cgi-bin/cstecgi.cgi file, where improper handling of the FileName argument allows remote attackers to overflow the stack. This vulnerability has a CVSS 3.1 score of 9.9, indicating critical impact on confidentiality, integrity, and availability. Public exploit code is available, but no active exploitation in the wild has been confirmed.
Potential Impact
Successful exploitation of this vulnerability can lead to remote code execution with high impact on system confidentiality, integrity, and availability. An attacker can remotely trigger a stack-based buffer overflow by manipulating the FileName parameter, potentially allowing full control over the affected device.
Mitigation Recommendations
No official patch or remediation information is currently available. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, restrict access to the affected device's management interface and monitor for suspicious activity related to the /cgi-bin/cstecgi.cgi endpoint.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-6hvp-8ww9-6wc7
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-82616"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a95a0fbacd9273b4947e43c
Added to database: 08/31/2026, 15:42:51 UTC
Last enriched: 09/07/2026, 23:52:17 UTC
Last updated: 10/15/2026, 18:48:24 UTC
Views: 85
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