Recorded 15 Oct 2026 at 21:30 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.

The historical field “Public exploit code” recorded Nuclei detection-template membership. It did not establish exploit availability. The original recorded fields remain below.

The historical “Publicly disclosed: No” field could represent a missing MSRC assessment. It does not establish that the vulnerability was undisclosed. The original recorded fields remain below.

CVEMicrosoft Security Response Center

Windows Credential Guard Elevation of Privilege Vulnerability

Heap-based buffer overflow in Windows Credential Guard allows an authorized attacker to elevate privileges locally.

What it said

CVE: CVE-2026-70578
Severity: Important
CVSS base score: 7.0
CVSS vector: CVSS:3.1/AV:L/AC:H/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 Unlikely
Component: Windows Credential Guard
Weakness: CWE-122: Heap-based Buffer Overflow
Issued by: Microsoft
Customer action: Required: apply the update
Affected products: Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 22H2 for 32-bit Systems, Windows 10 Version 22H2 for ARM64-based Systems, Windows 10 Version 22H2 for x64-based Systems, 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
Updates that fix it: KB5122878: Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 22H2 for 32-bit Systems, Windows 10 Version 22H2 for ARM64-based Systems, Windows 10 Version 22H2 for x64-based Systems (restart required); KB5122880: Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems (restart required); KB5124008: 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 (restart required); KB5124012: Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems (restart required)
CISA KEV: Not listed in the collected catalog
EPSS: 0.3%; scored 15 Oct 2026
Public exploit code: No Nuclei template listed
Published: 8 Sep 2026 07:00 UTC
Last revised: 8 Sep 2026 07:00 UTC
Revision note: Information published.

Recorded links

Source evidence when recorded

Microsoft security releases: Complete at observationRead 15 Oct 2026 at 21:30 UTC
CISA KEV: Complete at observationRead 15 Oct 2026 at 21:30 UTC
FIRST EPSS: Complete at observationRead 15 Oct 2026 at 21:30 UTC
Public detection templates (Nuclei): Complete at observationRead 15 Oct 2026 at 21:30 UTC

Coverage describes the sources at this observation. A complete read then does not establish their current position.

Page history

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Field-level log (3)

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15 Oct 2026 · 21:30:54 UTC EPSS0.3%; scored 14 Oct 2026 → 0.3%; scored 15 Oct 2026
15 Oct 2026 · 01:07:54 UTC EPSS0.3%; scored 13 Oct 2026 → 0.3%; scored 14 Oct 2026
14 Oct 2026 · 11:22:42 UTC Source coverage: msrc-cvrfIncomplete → Current