CVE-2026-31195
Authenticated Command Injection in SFR France GR140DG and GR140IG Fibre CPE
Publication date: 2026-05-05
Last updated on: 2026-05-06
Assigner: MITRE
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| altice_labs | sfr_france_gr140dg | * |
| altice_labs | sfr_france_gr140ig | From 3GN8020801R13 (inc) to 3GN8020803R0B (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-78 | The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in the ping diagnostic handler of the /bin/httpd_clientside component in ALTICE LABS / SFR France GR140DG and GR140IG fibre routers. It occurs because user input is inserted directly into a system() call without proper sanitization or validation. Authenticated remote attackers can exploit this by crafting malicious destAddr parameters that use shell command substitution, allowing them to execute arbitrary commands with root privileges on the device.
How can this vulnerability impact me? :
Exploiting this vulnerability can lead to full device compromise. An attacker with authentication can execute arbitrary commands as root, which may result in credential theft, modification of device configuration, and tampering with the network. This can severely impact the security and functionality of the affected routers.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability involves an authenticated root command injection via the ping diagnostic handler in /bin/httpd_clientside on affected ALTICE LABS / SFR France GR140DG and GR140IG routers.
Detection can focus on monitoring for unusual or unauthorized use of the ping diagnostic feature, especially requests to /bin/httpd_clientside with crafted destAddr parameters that include shell command substitution characters.
Since the vulnerability requires authentication, checking WebUI access logs for suspicious activity or unexpected commands executed as root can help detect exploitation attempts.
Specific commands to detect exploitation attempts are not provided in the available resources.
What immediate steps should I take to mitigate this vulnerability?
- Apply the firmware update to version 3GN8020803R0B or later, which contains the fix for this vulnerability.
- Restrict WebUI access to the local area network (LAN) only to prevent remote exploitation.
- Rotate all credentials used for accessing the device to prevent unauthorized access.
- Disable remote management features to reduce the attack surface.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
This vulnerability allows authenticated remote attackers to execute arbitrary commands as root on affected devices, leading to full device compromise, credential theft, configuration modification, and network tampering.
Such impacts can result in unauthorized access to sensitive data and disruption of network security controls, which may lead to non-compliance with common standards and regulations like GDPR and HIPAA that require protection of personal and sensitive information.
However, the provided information does not explicitly discuss compliance implications or specific regulatory impacts.