CVE-2026-50647

CVE-2026-50647 is a high-severity vulnerability in Microsoft Windows 10 1607 with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-835.

Key facts

• Severity: High (CVSS 3.x base score 7.5)
• EPSS exploit prediction: 1% (62nd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-835
• Affected product: Microsoft Windows 10 1607
• Published: 2026-07-14
• Last modified: 2026-07-24

Description

Loop with unreachable exit condition ('infinite loop') in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.

Frequently asked questions

What is CVE-2026-50647?

Loop with unreachable exit condition ('infinite loop') in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.

How severe is CVE-2026-50647?

CVE-2026-50647 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-50647 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-50647?

CVE-2026-50647 primarily affects Microsoft Windows 10 1607. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-50647?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-50647 published?

CVE-2026-50647 was published on 2026-07-14 and last updated on 2026-07-24.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50647

Affected products (29)

• cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:.net_framework:4.8.1:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:.net_framework:4.8:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:.net_framework:4.6.2:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:.net_framework:4.7:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:.net_framework:4.7.1:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:.net_framework:4.7.2:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:.net_framework:3.5:-:*:*:*:*:*:*

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