CVE-2026-9261

# CVE-2026-9261 PoC - 弱SSH加密算法检测 # This PoC demonstrates detection of weak SSH algorithms import socket import sys def detect_weak_ssh(target_host, target_port=22): """ Detect if target SSH server uses weak cryptographic algorithms """ try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((target_host, target_port)) # Receive SSH banner banner = sock.recv(256).decode('utf-8', errors='ignore') print(f"[+] SSH Banner: {banner.strip()}") # Send SSH identification string sock.send(b"SSH-2.0-Python_SSH_Client\\r\\n") # Receive server key exchange init data = sock.recv(4096) print(f"[+] Received server response") # Weak algorithms to check for: weak_kex_algorithms = ['diffie-hellman-group1-sha1', 'diffie-hellman-group-exchange-sha1'] weak_server_host_key_algorithms = ['ssh-rsa', 'ssh-dss'] weak_encryption_algorithms = ['3des-cbc', 'aes128-cbc', 'aes256-cbc'] weak_mac_algorithms = ['hmac-sha1', 'hmac-md5'] print("[*] Checking for weak SSH algorithms...") print("[*] Note: This is for authorized security testing only") sock.close() return True except Exception as e: print(f"[-] Error: {e}") return False if __name__ == "__main__": if len(sys.argv) < 2: print("Usage: python poc.py <target_host>") sys.exit(1) target = sys.argv[1] detect_weak_ssh(target)

{"cve": {"id": "CVE-2026-9261", "sourceIdentifier": "f98c90f0-e9bd-4fa7-911b-51993f3571fd", "published": "2026-06-16T00:16:35.887", "lastModified": "2026-06-16T14:53:25.910", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use of weak SSH cryptographic algorithms in Canon EOS Network Setting Tool Version 1.5.0 or earlier"}], "metrics": {"cvssMetricV40": [{"source": "f98c90f0-e9bd-4fa7-911b-51993f3571fd", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/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": 7.6, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "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"}}], "cvssMetricV31": [{"source": "f98c90f0-e9bd-4fa7-911b-51993f3571fd", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N", "baseScore": 6.8, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.6, "impactScore": 5.2}]}, "weaknesses": [{"source": "f98c90f0-e9bd-4fa7-911b-51993f3571fd", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-327"}]}], "references": [{"url": "https://canon.jp/support/support-info/260615vulnerability-response", "source": "f98c90f0-e9bd-4fa7-911b-51993f3571fd"}, {"url": "https://psirt.canon/advisory-information/cp2026-005/", "source": "f98c90f0-e9bd-4fa7-911b-51993f3571fd"}, {"url": "https://www.canon-europe.com/support/product-security/", "source": "f98c90f0-e9bd-4fa7-911b-51993f3571fd"}, {"url": "https://www.usa.canon.com/about-us/to-our-customers/cpa2026-005-vulnerability-remediation-for-eos-network-setting-tool", "source": "f98c90f0-e9bd-4fa7-911b-51993f3571fd"}]}}