What is CVE-2026-23670?
Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to bypass a security feature locally.
The record classifies CVE-2026-23670 under weakness class CWE-822. Its CVSS v3 base vector states that the flaw requires local access to the host, needs high-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity. 12 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 185 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 5.7 — MEDIUM
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C - EPSS (FIRST)
- 0.2% probability of exploitation in the next 30 days, higher than 19.6% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 3.6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-04-14, last modified 2026-08-14
Is CVE-2026-23670 being exploited?
No public exploitation evidence for CVE-2026-23670 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-08-14. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.
Affected products and versions
- Microsoft: Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 22H3, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2019
How to fix CVE-2026-23670
Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23670. 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-2026-23670
1 tracked threat in the Threadlinqs corpus references CVE-2026-23670, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.