CVE-2026-83851
Windows Partition Management Driver Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Partition Management Driver allows an unauthorized attacker to elevate privileges over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Windows Partition Management Driver Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Partition Management Driver allows an unauthorized attacker to elevate privileges over a network.
- Record
CVE-2026-83851- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-122
- Updated
- 2026-11-10
EUVDEUVD-2026-99387
Heap-based buffer overflow in Windows Partition Management Driver allows an unauthorized attacker to elevate privileges over a network.
- Record
EUVD-2026-99387- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-10
GitHub AdvisoriesGHSA-9vj2-87jm-7ffm
Heap-based buffer overflow in Windows Partition Management Driver allows an unauthorized attacker...
Heap-based buffer overflow in Windows Partition Management Driver allows an unauthorized attacker to elevate privileges over a network.
- Record
GHSA-9vj2-87jm-7ffm- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-122
- Updated
- 2026-11-02
NVD
Heap-based buffer overflow in Windows Partition Management Driver allows an unauthorized attacker to elevate privileges over a network.
- Record
CVE-2026-83851- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-122
- Updated
- 2026-11-02
Affected products
- microsoft windows 10 version 1809
- microsoft windows 10 version 21h2
- microsoft windows 10 version 22h2
- microsoft windows 11 version 23h2
- microsoft windows 11 version 24h2
- microsoft windows 11 version 25h2
- microsoft windows 11 version 26h1
- microsoft windows 11 version 26h2
- microsoft windows server 2019
- microsoft windows server 2019 (server core installation)
- microsoft windows server 2022
- microsoft windows server 2025
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | EUVD | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-83851 is a high vulnerability (CVSS 8.8) in Microsoft Windows 10 Version 1809, published October 13, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.77%, the 55th percentile. No source names a fixed version.