CVE-2026-33826
Windows Active Directory Remote Code Execution Vulnerability
At a glance
- Severity
- HIGH 8.0
- EPSS
- EPSS 0.53 % · percentile 45 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- microsoft
- NVD status
- Analyzed
Description
Improper input validation in Windows Active Directory allows an authorized attacker to execute code over an adjacent network.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.0 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C | microsoft |
| CVSS 3.1 | HIGH 8.0 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · secure@microsoft.com (Secondary) |
Weaknesses (CWE)
European references
- ENISA EUVD · EUVD-2026-22645
- GCVE · GCVE-0-2026-33826
CERT-FR advisories
- CERTFR-2026-AVI-0442 — Multiples vulnérabilités dans Microsoft Windows · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*< 10.0.14393.9060cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*< 10.0.17763.8644cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*< 10.0.20348.5020cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*< 10.0.25398.2274cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*< 10.0.26100.32690
Affected products
| Product | Versions |
|---|---|
| Microsoft · Windows Server 2012 R2 | affected 6.3.9600.0 < 6.3.9600.23132 |
| Microsoft · Windows Server 2012 R2 (Server Core installation) | affected 6.3.9600.0 < 6.3.9600.23132 |
| Microsoft · Windows Server 2016 | affected 10.0.14393.0 < 10.0.14393.9060 |
| Microsoft · Windows Server 2016 (Server Core installation) | affected 10.0.14393.0 < 10.0.14393.9060 |
| Microsoft · Windows Server 2019 | affected 10.0.17763.0 < 10.0.17763.8644 |
| Microsoft · Windows Server 2019 (Server Core installation) | affected 10.0.17763.0 < 10.0.17763.8644 |
| Microsoft · Windows Server 2022 | affected 10.0.20348.0 < 10.0.20348.5020 |
| Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation) | affected 10.0.25398.0 < 10.0.25398.2274 |
| Microsoft · Windows Server 2025 | affected 10.0.26100.0 < 10.0.26100.32690 |
| Microsoft · Windows Server 2025 (Server Core installation) | affected 10.0.26100.0 < 10.0.26100.32690 |
References
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |