CVE-2026-31195 Details
Description
OS command injection vulnerability in the ping 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.
A command injection vulnerability has been identified in the ping diagnostic handler of the ALTICE LABS / SFR France GR140DG and GR140IG fibre CPE/Router/Gateway. This vulnerability allows authenticated remote attackers to execute arbitrary commands as root by exploiting the destAddr parameter with crafted input that takes advantage of shell command substitution. The issue arises because user input is inserted into a system() call without proper sanitization, enabling command execution on the device.
Users are advised to update to firmware version 3GN8020803R0B or later, which includes the fix for this vulnerability. For devices that have not yet received the update, it is recommended to restrict WebUI access to the LAN, rotate WebUI credentials, and disable remote management. Additionally, network segmentation between the router management interface and untrusted LAN devices, along with monitoring for unusual outbound traffic from the CPE, can help reduce exposure.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 6, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.alticelabs.com | [email protected] | |
| https://www.sfr.fr | [email protected] | |
| https://xerod.io/advisories/XEROD-2026-0001 | [email protected] |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-78 | Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') | CISA-ADP |
Affected Products
No affected product data is available for this CVE.
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 15, 2026 | CVE Modified | [email protected] |
| May 6, 2026 | CVE Modified | CISA-ADP |
| May 5, 2026 | New CVE Received | [email protected] |