CVE catalog

CVE-2026-35420

Heap-based buffer overflow in Windows Kernel allows an…

[CVE catalog]

Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

Severity
High · CVSS 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
Source
[NVD] · [CVE record]
EPSS
0.32% · Oct 27, 2026

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence
Original provider fields
{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "windows_server_2012",
      "ecosystem": "cpe",
      "fixed_version": ""
    },
    {
      "name": "windows_server_2016",
      "ecosystem": "cpe",
      "fixed_version": "10.0.14393.9140"
    },
    {
      "name": "windows_server_2019",
      "ecosystem": "cpe",
      "fixed_version": "10.0.17763.8755"
    },
    {
      "name": "windows_server_2022",
      "ecosystem": "cpe",
      "fixed_version": "10.0.20348.5074"
    },
    {
      "name": "windows_server_2022_23h2",
      "ecosystem": "cpe",
      "fixed_version": "10.0.25398.2330"
    },
    {
      "name": "windows_server_2025",
      "ecosystem": "cpe",
      "fixed_version": "10.0.26100.32772"
    },
    {
      "name": "windows_server_2012",
      "ranges": [],
      "ecosystem": "cpe",
      "fixed_version": "",
      "provider_record_id": "NVD-CVE-2026-35420"
    },
    {
      "name": "windows_server_2016",
      "ranges": [
        {
          "fixed": "10.0.14393.9140",
          "introduced": "",
          "last_affected": "",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "fixed_version": "10.0.14393.9140",
      "provider_record_id": "NVD-CVE-2026-35420"
    },
    {
      "name": "windows_server_2019",
      "ranges": [
        {
          "fixed": "10.0.17763.8755",
          "introduced": "",
          "last_affected": "",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "fixed_version": "10.0.17763.8755",
      "provider_record_id": "NVD-CVE-2026-35420"
    },
    {
      "name": "windows_server_2022",
      "ranges": [
        {
          "fixed": "10.0.20348.5074",
          "introduced": "",
          "last_affected": "",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "fixed_version": "10.0.20348.5074",
      "provider_record_id": "NVD-CVE-2026-35420"
    },
    {
      "name": "windows_server_2022_23h2",
      "ranges": [
        {
          "fixed": "10.0.25398.2330",
          "introduced": "",
          "last_affected": "",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "fixed_version": "10.0.25398.2330",
      "provider_record_id": "NVD-CVE-2026-35420"
    },
    {
      "name": "windows_server_2025",
      "ranges": [
        {
          "fixed": "10.0.26100.32772",
          "introduced": "",
          "last_affected": "",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "fixed_version": "10.0.26100.32772",
      "provider_record_id": "NVD-CVE-2026-35420"
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

Observed:

References

[CERT-Bund public advisories] · [FIRST EPSS] · [National Vulnerability Database (NVD)]