CVE-2026-24293
published 2026-03-10CVE-2026-24293: Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
PriorityP343high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.38%
30.5th percentile
Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Affected
34 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_10_21h2 | < 10.0.19044.7058 | 10.0.19044.7058 |
| microsoft | windows_10_22h2 | < 10.0.19045.7058 | 10.0.19045.7058 |
| microsoft | windows_10_version_21h2 | >= 10.0.19044.0 < 10.0.19044.7058 | 10.0.19044.7058 |
| microsoft | windows_10_version_22h2 | >= 10.0.19045.0 < 10.0.19045.7058 | 10.0.19045.7058 |
| microsoft | windows_11_23h2 | < 10.0.22631.6783 | 10.0.22631.6783 |
| 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_23h2 | >= 10.0.22631.0 < 10.0.22631.6783 | 10.0.22631.6783 |
| 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 | < 10.0.20348.4830 | 10.0.20348.4830 |
| microsoft | windows_server_2022 | >= 10.0.20348.0 < 10.0.20348.4893 | 10.0.20348.4893 |
| 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_10_version_21h2_for_32-bit_systems | — | — |
| msrc | windows_10_version_21h2_for_arm64-based_systems | — | — |
| msrc | windows_10_version_21h2_for_x64-based_systems | — | — |
| msrc | windows_10_version_22h2_for_32-bit_systems | — | — |
| msrc | windows_10_version_22h2_for_arm64-based_systems | — | — |
| msrc | windows_10_version_22h2_for_x64-based_systems | — | — |
| msrc | windows_11_version_23h2_for_arm64-based_systems | — | — |
| msrc | windows_11_version_23h2_for_x64-based_systems | — | — |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vendor_msrc7.8HIGH
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
VulDB
Microsoft Windows up to Server 2025 Ancillary Function Driver for WinSock null pointer dereference (WID-SEC-2026-0661)
vuldb·2026-07-07·CVSS 7.8
CVE-2026-24293 [HIGH] Microsoft Windows up to Server 2025 Ancillary Function Driver for WinSock null pointer dereference (WID-SEC-2026-0661)
A vulnerability, which was classified as critical, has been found in Microsoft Windows up to Server 2025. This vulnerability affects unknown code of the component Ancillary Function Driver for WinSock. Performing a manipulation results in null pointer dereference.
This vulnerability is identified as CVE-2026-24293. The attack is only possible with local access. There is not any exploit available.
It is suggested to install a patch to address this issue.
GHSA
GHSA-p66w-qxrc-77m9: Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally
ghsa_unreviewed·2026-03-10
CVE-2026-24293 [HIGH] CWE-476 GHSA-p66w-qxrc-77m9: Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally
Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Microsoft
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
vendor_msrc·2026-03-10·CVSS 7.8
CVE-2026-24293 [HIGH] CWE-476 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Description: Null pointer dereference in Windows Ancillary Function Driver for WinSock 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.
Windows Ancillary Function Driver for WinSock: Windows Ancillary Function Driver for WinSock
Microsoft: Microsoft
Customer Action Required: Yes
Impact: Elevation of Privilege
Exploit Status: Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely
Reference: https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5079466
Reference: https:/
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
Akuter Cyberangriff? Fordern Sie Sofort-Hilfe an
Sophos Central
Partner-Portal
Lizenzen & Accounts
Sophos Home
Sophos Central
Sophos-Central-Anmeldung
Sophos KI
Integrationen
Threat Intelligence
Testversion
Endpoint Protection (Next-Gen Antivirus)
EDR – Endpoint Detection and Response
Server Protection
Mobile Security
XDR – Extended Detection and Response
XDR mit Next-Gen SIEM
ITDR – Identity Threat Detection and Response
Next-Gen Firewall (NGFW)
NDR – Network Detection and Response
Netzwerk-Switches
Wireless Access Points
Workspace Protection
Protected Browser
Zero Trust Network Access (ZTNA)
DNS Protection
Email Monitoring System
E-Mail- und Phishing-Schutz
Awareness-Training für Mitarbeitende
Schutz für Cloud Workloads
Cloud Security Posture Management (CSP
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
Wiz
CVE-2026-24293 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 7.8
CVE-2026-24293 [HIGH] CVE-2026-24293 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-24293 :
vulnerability analysis and mitigation
Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Source : NVD
## 7.8
Score
Published March 10, 2026
Severity HIGH
CNA Score 7.8
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
## Get a CVE risk assessment
Get a prioritized view of CVEs in your cloud—so you can focus on what's exploitable, not just what's listed.
Free Vulnerability Assessment
## Benchmark your Cloud Security Posture
Evaluate your cloud security practices across 9 security domains to benchmark your risk level and iden
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
2026-03-10
Published