Recorded 23 Oct 2026 at 09:33 UTC. This is what ChangeIntel recorded, including the title, summary, facts and links. It is not a statement of the source's current position. See the latest record.
CVEMicrosoft Security Response Center
Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability
Integer overflow or wraparound in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.
What it said
- CVE
- CVE-2026-88074
- Severity
- Critical
- CVSS base score
- 7.8
- CVSS vector
- 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
- Impact
- Elevation of Privilege
- Exploitation detected
- Not reported by MSRC
- Publicly disclosed
- No
- Exploitability
- Exploitation Less Likely
- Component
- Windows Virtualization-Based Security (VBS) Enclave
- Weakness
- CWE-190: Integer Overflow or Wraparound
- Issued by
- Microsoft
- Customer action
- Required: apply the update
- Affected products
- Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems
- Updates that fix it
- KB5126653: Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems (restart required); KB5127646: Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems (restart required); KB5127648: Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems (restart required)
- CISA KEV
- Not listed in the collected catalog
- EPSS
- 0.3%; scored 22 Oct 2026
- Public exploit code
- No Nuclei template listed
- Published
- 13 Oct 2026 07:00 UTC
- Last revised
- 13 Oct 2026 07:00 UTC
- Revision note
- Information published.
Recorded links
Source evidence when recorded
- Microsoft security releases
- Complete at observationRead 23 Oct 2026 at 09:33 UTC
- CISA KEV
- Complete at observationRead 23 Oct 2026 at 09:33 UTC
- FIRST EPSS
- Complete at observationRead 23 Oct 2026 at 09:33 UTC
- Public exploit code
- Complete at observationRead 23 Oct 2026 at 09:33 UTC
Coverage describes the sources at this observation. A complete read then does not establish their current position.
What changed
First observed 14 Oct 2026- 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
- 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
- 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
- 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
- 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
- 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
- 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
- 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
- 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
- 23 Oct 2026 · 08:31:50 UTC Source coverage: first-epssCurrent → Incomplete
- 23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
- 23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete
Show 10 more recent changes
- 22 Oct 2026 · 17:33:15 UTCEPSS 0.3%; scored 21 Oct 2026 → 0.3%; scored 22 Oct 2026
- 21 Oct 2026 · 21:47:24 UTCEPSS 0.3%; scored 20 Oct 2026 → 0.3%; scored 21 Oct 2026
- 20 Oct 2026 · 20:53:31 UTCEPSS 0.3%; scored 19 Oct 2026 → 0.3%; scored 20 Oct 2026
- 19 Oct 2026 · 15:12:40 UTCEPSS 0.3%; scored 18 Oct 2026 → 0.3%; scored 19 Oct 2026
- 19 Oct 2026 · 15:12:40 UTCLink: Cisco Talos analysis → https://blog.talosintelligence.com/microsoft-patch-tuesday-for-october-2026
- 18 Oct 2026 · 14:54:30 UTCEPSS 0.3%; scored 16 Oct 2026 → 0.3%; scored 18 Oct 2026
- 18 Oct 2026 · 14:54:30 UTCLink: October 2026 → /security?release=2026-Oct#cves
- 16 Oct 2026 · 16:13:25 UTCEPSS 0.3%; scored 15 Oct 2026 → 0.3%; scored 16 Oct 2026
- 15 Oct 2026 · 21:30:54 UTCEPSS 0.3%; scored 14 Oct 2026 → 0.3%; scored 15 Oct 2026
- 15 Oct 2026 · 01:07:54 UTCEPSS Not scored → 0.3%; scored 14 Oct 2026
The most recent 100 field changes are listed. Complete recorded revisions are kept separately.
Cite this recorded revision to keep the same title, summary, facts and links when the page changes.
A day selects the latest observation by the end of that UTC day; today's selection can change until midnight. History starts when this installation records it.