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Recorded 23 Oct 2026 at 15:51 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 Storage Spaces Controller Denial of Service Vulnerability

Heap-based buffer overflow in Windows Storage Spaces Controller allows an unauthorized attacker to deny service over a network.

Cite this recorded revision

What it said

CVE
CVE-2026-87716
Severity
Important
CVSS base score
7.5
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Impact
Denial of Service
Exploitation detected
Not reported by MSRC
Publicly disclosed
No
Exploitability
Exploitation Less Likely
Component
Windows Storage Spaces Controller
Weakness
CWE-122: Heap-based Buffer Overflow
Issued by
Microsoft
Customer action
Required: apply the update
Affected products
Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, 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, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022 (Server Core installation), Windows Server 2025, Windows Server 2025 (Server Core installation)
Updates that fix it
KB5126646: Windows Server 2025, Windows Server 2025 (Server Core installation) (restart required); KB5126651: Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation) (restart required); KB5126653: Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems (restart required); KB5126655: Windows Server 2022, Windows Server 2022 (Server Core installation) (restart required); KB5126657: 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); 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
1.1%; scored 23 Oct 2026
Public exploit code
No Nuclei template listed
Published
13 Oct 2026 07:00 UTC
Last revised
16 Oct 2026 07:00 UTC
Revision note
Updated an acknowledgement. This is an informational change only.

Source evidence when recorded

Microsoft security releases
Complete at observationRead 23 Oct 2026 at 15:50 UTC
CISA KEV
Complete at observationRead 23 Oct 2026 at 15:50 UTC
FIRST EPSS
Complete at observationRead 23 Oct 2026 at 15:50 UTC
Public exploit code
Complete at observationRead 23 Oct 2026 at 15:50 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
  1. 23 Oct 2026 · 15:51:28 UTC EPSS1.1%; scored 22 Oct 2026 → 1.1%; scored 23 Oct 2026
  2. 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
  3. 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  4. 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
  5. 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
  6. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
  7. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  8. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
  9. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  10. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  11. 23 Oct 2026 · 08:31:50 UTC Source coverage: first-epssCurrent → Incomplete
  12. 23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
Show 12 more recent changes
  1. 23 Oct 2026 · 08:31:50 UTCSource coverage: msrc-cvrf Current → Incomplete
  2. 22 Oct 2026 · 17:33:15 UTCEPSS 1.1%; scored 21 Oct 2026 → 1.1%; scored 22 Oct 2026
  3. 21 Oct 2026 · 21:47:24 UTCEPSS 1.1%; scored 20 Oct 2026 → 1.1%; scored 21 Oct 2026
  4. 20 Oct 2026 · 20:53:31 UTCEPSS 1.1%; scored 19 Oct 2026 → 1.1%; scored 20 Oct 2026
  5. 19 Oct 2026 · 15:12:40 UTCEPSS 1.1%; scored 18 Oct 2026 → 1.1%; scored 19 Oct 2026
  6. 18 Oct 2026 · 14:54:30 UTCEPSS 1.1%; scored 16 Oct 2026 → 1.1%; scored 18 Oct 2026
  7. 18 Oct 2026 · 14:54:30 UTCLink: October 2026 → /security?release=2026-Oct#cves
  8. 16 Oct 2026 · 16:13:25 UTCRevision note Information published. → Updated an acknowledgement. This is an informational change only.
  9. 16 Oct 2026 · 16:13:25 UTCLast revised 13 Oct 2026 07:00 UTC → 16 Oct 2026 07:00 UTC
  10. 16 Oct 2026 · 16:13:25 UTCEPSS 1.1%; scored 15 Oct 2026 → 1.1%; scored 16 Oct 2026
  11. 15 Oct 2026 · 21:30:54 UTCEPSS 1.1%; scored 14 Oct 2026 → 1.1%; scored 15 Oct 2026
  12. 15 Oct 2026 · 01:07:54 UTCEPSS Not scored → 1.1%; 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.

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

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