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CVE-2026-78444

🗓️ 08 Sep 2026 17:18:23Reported by microsoftType 
cve
 cve
🔗 web.nvd.nist.gov👁 90 Views

Untrusted pointer dereference in Windows Failover Cluster enabling network code execution.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
bdu_fstec
BDU FSTEC
Failover Cluster Code Execution
7 Oct 202600:00
–bdu_fstec
circl
Circl
CVE-2026-78444
8 Sep 202622:01
–circl
cvelist
Cvelist
CVE-2026-78444 Microsoft Failover Cluster Remote Code Execution Vulnerability
8 Sep 202617:18
–cvelist
euvd
EUVD
EUVD-2026-73800
8 Sep 202617:18
–euvd
mskb
Microsoft KB
September 8, 2026—KB5122871 (OS Build 26100.33438)
13 Oct 202614:00
–mskb
mskb
Microsoft KB
September 8, 2026—KB5122882 (OS Build 20348.5622)
13 Oct 202614:00
–mskb
mscve
Microsoft CVE
Microsoft Failover Cluster Remote Code Execution Vulnerability
8 Sep 202614:00
–mscve
nvd
NVD
CVE-2026-78444
8 Sep 202618:20
–nvd
ptsecurity
Positive Technologies
PT-2026-109363
8 Sep 202600:00
–ptsecurity
ptsecurity
Positive Technologies
PT-2026-87988
8 Sep 202600:00
–ptsecurity
Rows per page
NVD
Vulners
CNA
Node
OR
microsoftwindows_10_1809Range<10.0.17763.9245x64
microsoftwindows_10_1809Range<10.0.17763.9245x86
microsoftwindows_server_2019Range<10.0.17763.9245
microsoftwindows_server_2022Range<10.0.20348.5622
microsoftwindows_server_2025Range<10.0.26100.33438
[
  {
    "vendor": "Microsoft",
    "product": "Windows 10 Version 1809",
    "platforms": [
      "32-bit Systems",
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.17763.0",
        "lessThan": "10.0.17763.9245",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2019",
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.17763.0",
        "lessThan": "10.0.17763.9245",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2019 (Server Core installation)",
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.17763.0",
        "lessThan": "10.0.17763.9245",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2022",
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.20348.0",
        "lessThan": "10.0.20348.5622",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2025",
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.26100.0",
        "lessThan": "10.0.26100.33438",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2025 (Server Core installation)",
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.26100.0",
        "lessThan": "10.0.26100.33438",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  }
]

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14 Oct 2026 23:13Current
7.7High risk
Vulners AI Score7.7
CVSS 3.18.1
EPSS0.00707
SSVC
90