CVE-2023-21768

highpriority · track · 33EPSS 0.654 · 99 %ileexploit · weaponizedDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

15 exploits · weaponized

Likely / severe?

65.4% (99th) EPSS

CVSS 7.8 · high

Is it mine?

42 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-26

Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedWindows 11 Version 22H2 for ARM64-based Systemsmsrc_csaf
10.0.22621.1105:Security Update:https://support.microsoft.com/help/5022303
https://support.microsoft.com/help/5022303
FixedWindows 11 Version 22H2 for x64-based Systemsmsrc_csaf
10.0.22621.1105:Security Update:https://support.microsoft.com/help/5022303
https://support.microsoft.com/help/5022303
FixedWindows 11 version 21H2 for ARM64-based Systemsmsrc_csaf
10.0.22000.1455:Security Update:https://support.microsoft.com/help/5022287
https://support.microsoft.com/help/5022287
FixedWindows 11 version 21H2 for x64-based Systemsmsrc_csaf
10.0.22000.1455:Security Update:https://support.microsoft.com/help/5022287
https://support.microsoft.com/help/5022287
FixedWindows Server 2022msrc_csaf
10.0.20348.1487:Security Update:https://support.microsoft.com/help/5022291
https://support.microsoft.com/help/5022291
FixedWindows Server 2022 (Server Core installation)msrc_csaf
10.0.20348.1487:Security Update:https://support.microsoft.com/help/5022291
https://support.microsoft.com/help/5022291

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.8highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 1.8 · impact 5.9

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-264USCWE-822USCWE-822US

exploits (15)

Public proof-of-concept and weaponised exploit code.

exploit/windows/local/cve_2023_21768_afd_lpeAncillary Function Driver (AFD) for WinSock Elevation of Privilegeweaponized · metasploit
IlanDudnik/CVE-2023-21768Exploit implementation with IO Rings for CVE-2023-21768PoC · poc_in_github
Malwareman007/CVE-2023-21768Windows_AFD_LPE_CVE-2023-21768PoC · poc_in_github
P4x1s/CVE-2023-21768-POCCVE-2023-21768 Windows 11 22H2 系统本地提权 POCPoC · poc_in_github
Rosayxy/Recreate-cve-2023-21768recreating exp for cve-2023-21768.PoC · poc_in_github
SamuelTulach/nullmapUsing CVE-2023-21768 to manual map kernel mode driver PoC · poc_in_github

affected products (42)

Products and version ranges known to be affected.

Hitachi Storageall versionscert_bundDEcpe:/h:hitachi:storage:-
Microsoft Windows 10 Version 1607all versionscert_bundDEcpe:/o:microsoft:windows_10:version_1607
Microsoft Windows 10 Version 1809all versionscert_bundDEcpe:/o:microsoft:windows_10:version_1809
Microsoft Windows 10 Version 20H2all versionscert_bundDEcpe:/o:microsoft:windows_10:version_20h2
Microsoft Windows 10 Version 21H2all versionscert_bundDEcpe:/o:microsoft:windows_10:version_21h2
Microsoft Windows 10 Version 22H2all versionscert_bundDEcpe:/o:microsoft:windows_10:version_22h2
Microsoft Windows 10 Windows Terminalall versionscert_bundDEcpe:/o:microsoft:windows_10:windows_terminal
Microsoft Windows 11 Version 22H2all versionscert_bundDEcpe:/o:microsoft:windows_11:version_22h2
Microsoft Windows 11 version 21H2all versionscert_bundDE
Microsoft Windows 7 SP1all versionscert_bundDEcpe:/o:microsoft:windows_7:-:sp1
Microsoft Windows 8.1all versionscert_bundDEcpe:/o:microsoft:windows_8.1:-
Microsoft Windows RT 8.1all versionscert_bundDEcpe:/o:microsoft:windows_rt_8.1:-
Microsoft Windows Server 2008 R2 SP1all versionscert_bundDEcpe:/o:microsoft:windows_server_2008_r2:sp_1
Microsoft Windows Server 2008 SP2all versionscert_bundDEcpe:/o:microsoft:windows_server_2008:sp2:x64
Microsoft Windows Server 2012all versionscert_bundDEcpe:/o:microsoft:windows_server_2012:-
Microsoft Windows Server 2012 R2all versionscert_bundDEcpe:/o:microsoft:windows_server_2012_r2:-
Microsoft Windows Server 2016all versionscert_bundDEcpe:/o:microsoft:windows_server_2016:-
Microsoft Windows Server 2019all versionscert_bundDEcpe:/o:microsoft:windows_server_2019:-
Microsoft Windows Server 2022all versionscert_bundDEcpe:/o:microsoft:windows_server_2022:-
Microsoft Windows 11≤ version 21H2cert_bundDE

showing 20 of 42

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-0055Microsoft Windows und Microsoft Windows Server: Mehrere SchwachstellenDeutsch2023-01-10csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Microsoft Windows und Microsoft Windows Server ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, seine Privilegien zu erweitern und einen Denial-of-Service-Zustand auszulösen.
msrc_CVE-2023-21768Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability2023-01-10csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund msrc_csaf NVD CVE.org MITRE

published 2023-01-10modified 2026-06-17

references (7)

External citations — patches, advisories, analysis.

scry

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