CVE-2026-31196
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk46th percentile - higher than 46% of all known CVEs
Summary
There is an OS command injection vulnerability in the traceroute diagnostic handler in the ALTICE LABS / SFR France GR140DG Fibre Router. Unsanitized user input is inserted into a system() call, allowing authenticated remote attackers to execute arbitrary commands as root.
Risk Assessment
This vulnerability poses a serious security risk as it allows attackers to remotely execute commands with administrator privileges, potentially leading to full system compromise.
Recommendation
It is recommended to update the router's firmware to the latest version to mitigate this vulnerability and implement additional security measures, such as restricting access to the administrative interface.
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Original NVD description (English source)
OS command injection vulnerability in the traceroute diagnostic handler in /bin/httpd_clientside in ALTICE LABS / SFR France GR140DG Fibre Router with firmware 3GN8020801R13, 3GN8020802R0A, or 3GN8020803R0A inserts unsanitized user input into a system() call, allowing authenticated remote attackers to execute arbitrary commands as root via crafted destAddr parameters using shell command substitution.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

