What is CVE-2023-21768?
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
The record classifies CVE-2023-21768 under weakness class CWE-822. Its CVSS v3 base vector states that the flaw requires local access to the host, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 3 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 1397 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 7.8 — HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - EPSS (FIRST)
- 65.4% probability of exploitation in the next 30 days, higher than 99.2% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 9.9/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2023-01-10, last modified 2025-01-01
Is CVE-2023-21768 being exploited?
Weaponised exploit code for CVE-2023-21768 is publicly available. 11 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 38 in the Threadlinqs vulnerability feed.
- chompie1337/Windows_LPE_AFD_CVE-2023-21768 (github)
- SamuelTulach/nullmap (github)
- Malwareman007/CVE-2023-21768 (github)
- cl4ym0re/cve-2023-21768-compiled (github)
- P4x1s/CVE-2023-21768-POC (github)
- zoemurmure/CVE-2023-21768-AFD-for-WinSock-EoP-exploit (github)
- xboxoneresearch/CVE-2023-21768-dotnet (github)
- h1bAna/CVE-2023-21768 (github)
Affected products and versions
- Microsoft: Windows Server 2022, Windows 11 version 21H2, Windows 11 version 22H2
How to fix CVE-2023-21768
Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21768. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2023-21768
1 tracked threat in the Threadlinqs corpus references CVE-2023-21768, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, NVD, FIRST EPSS, public proof-of-concept repositories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.