CVE-2025-62559

// CVE-2025-62559 PoC - Microsoft Office Word Use After Free // This is a conceptual PoC demonstrating the vulnerability trigger mechanism // In practice, exploitation requires precise heap Feng Shui and memory manipulation #include <windows.h> #include <stdio.h> // Malicious document trigger - simulates the memory corruption condition void trigger_uaf_condition() { // In real exploit: allocate objects, free them, then reuse freed memory // This requires precise timing and memory layout control // Step 1: Create Word application instance // Step 2: Open malicious .docx file with crafted payload // Step 3: Trigger use-after-free condition during document parsing // Step 4: Control freed memory to hijack execution flow printf("[*] CVE-2025-62559 PoC Trigger\n"); printf("[*] Target: Microsoft Office Word\n"); printf("[*] Vulnerability: Use After Free\n"); printf("[*] Attack Vector: Malicious document file\n"); } // Example malicious document structure (simplified) unsigned char malicious_doc_template[] = { // OLE/CFB structure with crafted binary data // that triggers UAF during Word document parsing 0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1, // Additional payload bytes to trigger vulnerability 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48 }; int main() { printf("CVE-2025-62559 Use After Free in Microsoft Office Word\n"); printf("This PoC demonstrates the vulnerability trigger concept.\n"); printf("Actual exploitation requires: 1) Malformed document 2) Heap spraying 3) Memory corruption\n"); trigger_uaf_condition(); return 0; }

{"cve": {"id": "CVE-2025-62559", "sourceIdentifier": "[email protected]", "published": "2025-12-09T18:16:01.480", "lastModified": "2025-12-10T15:38:54.547", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/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": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*", "matchCriteriaId": "3259EBFE-AE2D-48B8-BE9A-E22BBDB31378"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*", "matchCriteriaId": "CD25F492-9272-4836-832C-8439EBE64CCF"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x64:*", "matchCriteriaId": "CF5DDD09-902E-4881-98D0-CB896333B4AA"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x86:*", "matchCriteriaId": "26A3B226-5D7C-4556-9350-5222DC8EFC2C"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x64:*", "matchCriteriaId": "851BAC4E-9965-4F40-9A6C-B73D9004F4C1"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x86:*", "matchCriteriaId": "23B2FA23-76F4-4D83-A718-B8D04D7EA37B"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*", "matchCriteriaId": "BF0E8112-5B6F-4E55-8E40-38ADCF6FC654"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x64:*", "matchCriteriaId": "D31E509A-0B2E-4B41-88C4-0099E800AFE6"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x86:*", "matchCriteriaId": "017A7041-BEF1-4E4E-AC8A-EFC6AFEB01FE"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:macos:*:*", "matchCriteriaId": "EF3E56B5-E6A6-4061-9380-D421E52B9199"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*", "matchCriteriaId": "F815EF1D-7B60-47BE-9AC2-2548F99F10E4"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*", "matchCriteriaId": "6122D014-5BF1-4AF4-8B4D-80205ED7785E"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x64:*", "matchCriteriaId": "E1FE9E95-4874-46EF-AC93-9E485F7A2AC0"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x86:*", "matchCriteriaId": "38479B5D-66F9-4260-A18A-F6E3D9B6991E"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62559", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}