CVE-2026-24283
published 2026-03-10CVE-2026-24283: Heap-based buffer overflow in Windows File Server allows an authorized attacker to elevate privileges locally.
PriorityP355high8.8CVSS 3.1
AVLACLPRLUINSCCHIHAH
EPSS
0.38%
30.9th percentile
Heap-based buffer overflow in Windows File Server allows an authorized attacker to elevate privileges locally.
Affected
17 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_11_24h2 | < 10.0.26100.7979 | 10.0.26100.7979 |
| microsoft | windows_11_25h2 | < 10.0.26200.7979 | 10.0.26200.7979 |
| microsoft | windows_11_26h1 | < 10.0.28000.1719 | 10.0.28000.1719 |
| microsoft | windows_11_version_24h2 | >= 10.0.26100.0 < 10.0.26100.8037 | 10.0.26100.8037 |
| microsoft | windows_11_version_25h2 | >= 10.0.26200.0 < 10.0.26200.8037 | 10.0.26200.8037 |
| microsoft | windows_11_version_26h1 | >= 10.0.28000.0 < 10.0.28000.1719 | 10.0.28000.1719 |
| microsoft | windows_server_2022_23h2 | < 10.0.25398.2207 | 10.0.25398.2207 |
| microsoft | windows_server_2025 | < 10.0.26100.32463 | 10.0.26100.32463 |
| microsoft | windows_server_2025 | >= 10.0.26100.0 < 10.0.26100.32522 | 10.0.26100.32522 |
| msrc | windows_11_version_24h2_for_arm64-based_systems | — | — |
| msrc | windows_11_version_24h2_for_x64-based_systems | — | — |
| msrc | windows_11_version_25h2_for_arm64-based_systems | — | — |
| msrc | windows_11_version_25h2_for_x64-based_systems | — | — |
| msrc | windows_11_version_26h1_for_arm64-based_systems | — | — |
| msrc | windows_11_version_26h1_for_x64-based_systems | — | — |
| msrc | windows_server_2022_23h2_edition | — | — |
| msrc | windows_server_2025 | — | — |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
vendor_msrc8.8HIGH
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VulDB
Microsoft Windows up to Server 2025 UNC Provider Kernel Driver heap-based overflow (Nessus ID 301780 / WID-SEC-2026-0661)
vuldb·2026-07-06·CVSS 8.8
CVE-2026-24283 [HIGH] Microsoft Windows up to Server 2025 UNC Provider Kernel Driver heap-based overflow (Nessus ID 301780 / WID-SEC-2026-0661)
A vulnerability was found in Microsoft Windows 11 24H2/11 25H2/11 26H1/Server 2022 23H2/Server 2025. It has been rated as critical. The affected element is an unknown function of the component UNC Provider Kernel Driver. This manipulation causes heap-based buffer overflow.
This vulnerability appears as CVE-2026-24283. The attack requires local access. There is no available exploit.
It is suggested to install a patch to address this issue.
GHSA
GHSA-663r-gf69-4p39: Heap-based buffer overflow in Windows File Server allows an authorized attacker to elevate privileges locally
ghsa_unreviewed·2026-03-10
CVE-2026-24283 [HIGH] CWE-122 GHSA-663r-gf69-4p39: Heap-based buffer overflow in Windows File Server allows an authorized attacker to elevate privileges locally
Heap-based buffer overflow in Windows File Server allows an authorized attacker to elevate privileges locally.
Microsoft
Multiple UNC Provider Kernel Driver Elevation of Privilege Vulnerability
vendor_msrc·2026-03-10·CVSS 8.8
CVE-2026-24283 [HIGH] CWE-122 Multiple UNC Provider Kernel Driver Elevation of Privilege Vulnerability
Multiple UNC Provider Kernel Driver Elevation of Privilege Vulnerability
Description: Heap-based buffer overflow in Windows File Server allows an authorized attacker to elevate privileges locally.
FAQ: What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
FAQ: According to the CVSS score, this vulnerability has Scope: Changed (S:C). What does this mean?
A CVSS Scope change (S:C) means that successful exploitation of this vulnerability allows an attacker to access resources outside the original security boundary of the vulnerable component. In this case, the vulnerable code runs within a restricted AppContainer environment, and exploitation could allow an attack
No detection rules found.
No public exploits indexed.
Sophos
March Patch Tuesday visits 15 product families
blogs_sophos·2026-03-13
March Patch Tuesday visits 15 product families
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Bleepingcomputer
Microsoft March 2026 Patch Tuesday fixes 2 zero-days, 79 flaws
blogs_bleepingcomputer·2026-03-10·CVSS 8.8
[HIGH] Microsoft March 2026 Patch Tuesday fixes 2 zero-days, 79 flaws
## Microsoft March 2026 Patch Tuesday fixes 2 zero-days, 79 flaws
## Lawrence Abrams
The number of bugs in each vulnerability category is listed below:
46 Elevation of Privilege Vulnerabilities
2 Security Feature Bypass Vulnerabilities
18 Remote Code Execution Vulnerabilities
10 Information Disclosure Vulnerabilities
4 Denial of Service Vulnerabilities
4 Spoofing Vulnerabilities
When BleepingComputer reports on Patch Tuesday security updates, we only count those released by Microsoft today. Therefore, the number of flaws does not include 9 Microsoft Edge flaws, Mariner, Payment Orchestrator Service, Azure, and Microsoft Devices Pricing Program flaws fixed earlier this month.
To learn more about the non-security updates released today, you can review our dedicated articles on the
Sophos
March Patch Tuesday visits 15 product families
blogs_sophos
March Patch Tuesday visits 15 product families
Share This
Microsoft on Tuesday released 84 patches affecting 15 product families – including a few you’ve possibly never encountered. Eight of the addressed issues are considered by Microsoft to be of Critical severity, though none of those affect Windows, nor are they expected to be exploited within the next 30 days. In addition, five of those Critical issues were in fact addressed by Microsoft in advance of Patch Tuesday itself, as we’ll discuss below. Twenty-two have a CVSS base score of 8.0 or higher, including one with a 9.8 base score. None are known to be under active exploit in the wild, but two are publicly disclosed so far.
At patch time, six CVEs are judged more likely to be exploited in the next 30 days by the company’s estimation. Various of this month’s issues are amenable
Wiz
CVE-2026-24283 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 8.8
CVE-2026-24283 [HIGH] CVE-2026-24283 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-24283 :
vulnerability analysis and mitigation
Heap-based buffer overflow in Windows File Server allows an authorized attacker to elevate privileges locally.
Source : NVD
## 8.8
Score
Published March 10, 2026
Severity HIGH
CNA Score 8.8
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 15.2
Exploitation Probability (EPSS) N/A
Sources
NVD
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2026-03-10
Published