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CVE-2026-88074CriticalEoPLocal

Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability

MSRC advisory NVD CVE.org

Assessment

Integer overflow or wraparound in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.

Severity
Critical
CVSS base score
7.8CVSS: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
EPSS, next 30 days
0.3%Higher than 25.3% of scored CVEs · FIRST model run 25 Oct 2026 · about EPSS
Public exploit code
No Nuclei template lists it
Exploitability
Exploitation Less Likely
Publicly disclosed
No
Customer action
Required: apply the update
Component
Windows Virtualization-Based Security (VBS) Enclave
Weakness
CWE-190: Integer Overflow or Wraparound
Issued by
Microsoft
Published
13 Oct 2026 · October 2026
Last revised
13 Oct 2026
CVSS 3.1 base metricsRed raises the risk · green lowers it
Attack vector
LocalAV:L
Attack complexity
LowAC:L
Privileges required
LowPR:L
User interaction
NoneUI:N
Scope
UnchangedS:U
Confidentiality
HighC:H
Integrity
HighI:H
Availability
HighA:H

Updates that fix it

3 KBs
KBTypeRestartApplies toOther CVEs
KB5126653 Security UpdateRequiredWindows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based SystemsAll CVEs in KB5126653
KB5127646 Security UpdateRequiredWindows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based SystemsAll CVEs in KB5127646
KB5127648 Security UpdateRequiredWindows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems and 3 moreAll CVEs in KB5127648

Affected products

Windows
10 affected products

Independent patch analysis

Cisco Talos Intelligence

Microsoft Patch Tuesday for October 2026 — Snort rules and prominent vulnerabilities · 13 Oct 2026

Talos supplies analysis and cycle-level Snort rule references. Its article does not map each rule to a CVE or establish protection for your deployment. MSRC remains the source for vulnerability and fixing-update facts.

What changed

First observed 14 Oct 2026
  1. 25 Oct 2026 · 17:12:51 UTC EPSS0.3%; scored 24 Oct 2026 → 0.3%; scored 25 Oct 2026
  2. 25 Oct 2026 · 01:34:18 UTC EPSS0.3%; scored 23 Oct 2026 → 0.3%; scored 24 Oct 2026
  3. 23 Oct 2026 · 15:51:28 UTC EPSS0.3%; scored 22 Oct 2026 → 0.3%; scored 23 Oct 2026
  4. 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
  5. 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  6. 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
  7. 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
  8. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
  9. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  10. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
  11. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  12. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
Show 13 more recent changes
  1. 23 Oct 2026 · 08:31:50 UTCSource coverage: first-epss Current → Incomplete
  2. 23 Oct 2026 · 08:31:50 UTCSource coverage: cisa-kev Current → Incomplete
  3. 23 Oct 2026 · 08:31:50 UTCSource coverage: msrc-cvrf Current → Incomplete
  4. 22 Oct 2026 · 17:33:15 UTCEPSS 0.3%; scored 21 Oct 2026 → 0.3%; scored 22 Oct 2026
  5. 21 Oct 2026 · 21:47:24 UTCEPSS 0.3%; scored 20 Oct 2026 → 0.3%; scored 21 Oct 2026
  6. 20 Oct 2026 · 20:53:31 UTCEPSS 0.3%; scored 19 Oct 2026 → 0.3%; scored 20 Oct 2026
  7. 19 Oct 2026 · 15:12:40 UTCEPSS 0.3%; scored 18 Oct 2026 → 0.3%; scored 19 Oct 2026
  8. 19 Oct 2026 · 15:12:40 UTCLink: Cisco Talos analysis → https://blog.talosintelligence.com/microsoft-patch-tuesday-for-october-2026
  9. 18 Oct 2026 · 14:54:30 UTCEPSS 0.3%; scored 16 Oct 2026 → 0.3%; scored 18 Oct 2026
  10. 18 Oct 2026 · 14:54:30 UTCLink: October 2026 → /security?release=2026-Oct#cves
  11. 16 Oct 2026 · 16:13:25 UTCEPSS 0.3%; scored 15 Oct 2026 → 0.3%; scored 16 Oct 2026
  12. 15 Oct 2026 · 21:30:54 UTCEPSS 0.3%; scored 14 Oct 2026 → 0.3%; scored 15 Oct 2026
  13. 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.

Explore global source statements, affected packages and advisory history for CVE-2026-88074. The catalog has a separate collection scope from Microsoft release records.

Collected exploitation and prediction evidence

Risk source coverage

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-88074

Published

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.

Source published
13 Oct 2026 19:00:17 UTC
Source modified
25 Oct 2026 18:42:27 UTC
Observed here
25 Oct 2026 20:02:02 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · 7.8 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

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 25 Oct 21:06 UTC · 271 of 271 readable · 269 fully read · documentation 464/464 current

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