Microsoft Patch Tuesday

This month's Microsoft Security Update Guide release: severity and exploitation dashboards, a searchable CVE browser, and a downloadable brief.

Browse This Release's CVEs

Severity
Exploitation

12 of 448 CVEs match the current filters, sorted by EVULNABLE Risk.

Filtered by Matching “Denial of Service” — remove Clear all
CVEs in this Patch Tuesday release matching the current filters, ranked by EVULNABLE Risk Score
CVE TitleMSRC severity EVRS CVSS EPSS KEV Actively Exploited Product(s)
CVE-2026-59132 Windows TCP/IP Denial of Service Vulnerability Important 16 Elevated 7.5 0.017 No No 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), Windows Server 2022, Windows Server 2022 (Server Core installation), +24 more
CVE-2026-62901 .NET Denial of Service Vulnerability Important 12 Elevated 7.5 0.011 No No Microsoft Visual Studio 2026 version 18.8, .NET 10.0 installed on Mac OS, .NET 10.0 installed on Linux, .NET 8.0 installed on Windows, .NET 8.0 installed on Linux, .NET 8.0 installed on Mac OS, +4 more
CVE-2026-65681 Windows iSCSI Target Service Denial of Service Vulnerability Important 12 Elevated 7.5 0.009 No No 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), Windows Server 2022, Windows Server 2022 (Server Core installation), +6 more
CVE-2026-62702 Windows Graphics Kernel Denial of Service Vulnerability Important 11 Elevated 6.8 0.009 No No Windows Server 2022, Windows Server 2022 (Server Core installation), 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 x64-based Systems, +12 more
CVE-2026-59138 Microsoft Remote Registry Service Denial of Service Vulnerability Important 11 Elevated 6.5 0.010 No No 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), Windows Server 2022, Windows Server 2022 (Server Core installation), +24 more
CVE-2026-61345 Microsoft Remote Registry Service Denial of Service Vulnerability Important 11 Elevated 6.5 0.010 No No 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), Windows Server 2022, Windows Server 2022 (Server Core installation), +24 more
CVE-2026-62912 Microsoft Exchange Server Denial of Service Vulnerability Important 11 Elevated 6.5 0.013 No No Microsoft Exchange Server Subscription Edition RTM, Microsoft Exchange Server 2019 Cumulative Update 15, Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 14
CVE-2026-54113 Remote Procedure Call Denial of Service Vulnerability Important 10 Elevated 7.5 0.011 No No 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), Windows Server 2022, Windows Server 2022 (Server Core installation), +22 more
CVE-2026-55015 Microsoft Remote Help Denial of Service Vulnerability Important 10 Elevated 5.5 0.005 No No Windows Remote Help
CVE-2026-70348 Windows Management Services Denial of Service Vulnerability Important 10 Elevated 5.5 0.004 No No Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 version 26H1 for x64-based Systems, Windows 11 Version 26H1 for ARM64-based Systems
CVE-2026-65785 Windows DHCP Client Denial of Service Vulnerability Important 8 Routine 6.5 0.004 No No Windows Server 2025 (Server Core installation), Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows Server 2025, +2 more
CVE-2026-68819 Windows Network File System Denial of Service Vulnerability Important 8 Routine 5.9 0.007 No No 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), Windows Server 2022, Windows Server 2022 (Server Core installation), +10 more
Download filtered CVEs (CSV) Patch Tuesday Brief (PDF)

The CSV is exactly the 12 CVE(s) matching the filters above. The PDF is the full leadership brief — at-a-glance summary, Patch First spotlight, top affected products, and the complete per-CVE inventory — not filtered to what is shown here.

CVE detail

Expand any CVE for its description, EVRS score breakdown, and affected products.

CVE-2026-59132 — Windows TCP/IP Denial of Service Vulnerability

Denial of Service

EVULNABLE Risk · priority 16/100 Elevated Intelligence coverage 90/100 — no ransomware association data, no CISA KEV listing date

Recommended priority: Scheduled Maintenance

Why this score: CVSS base score 7.5, and Microsoft Exploitability Index: Exploitation More Likely.

Exploitation status: Neither

Microsoft Exploitability Index: Exploitation More Likely

CVSS v3.1 base score: 7.5

FIRST EPSS: 0.017 (75.4th pctl) — probability of exploitation in the next 30 days, with its rank across all scored CVEs

CISA KEV: Not currently listed

KB article(s): 5120238, 5120242, 5120229, 5120249, 5120233, 5120228, 5121003, 5120994, 5120240, 5121000, 5120418, 5120386, 5120385

Affected product(s): 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), Windows Server 2022, Windows Server 2022 (Server Core installation), +24 more

Microsoft Security Update Guide ↗ NVD ↗
CVE-2026-62901 — .NET Denial of Service Vulnerability

Denial of Service

EVULNABLE Risk · priority 12/100 Elevated Intelligence coverage 90/100 — no ransomware association data, no CISA KEV listing date

Recommended priority: Scheduled Maintenance

Why this score: CVSS base score 7.5, and Microsoft Exploitability Index: Exploitation Less Likely.

Exploitation status: Neither

Microsoft Exploitability Index: Exploitation Less Likely

CVSS v3.1 base score: 7.5

FIRST EPSS: 0.011 (62.2nd pctl) — probability of exploitation in the next 30 days, with its rank across all scored CVEs

CISA KEV: Not currently listed

KB article(s): 5122106, 5122104, 5122105

Affected product(s): Microsoft Visual Studio 2026 version 18.8, .NET 10.0 installed on Mac OS, .NET 10.0 installed on Linux, .NET 8.0 installed on Windows, .NET 8.0 installed on Linux, .NET 8.0 installed on Mac OS, +4 more

Microsoft Security Update Guide ↗ NVD ↗
CVE-2026-65681 — Windows iSCSI Target Service Denial of Service Vulnerability

Denial of Service

EVULNABLE Risk · priority 12/100 Elevated Intelligence coverage 90/100 — no ransomware association data, no CISA KEV listing date

Recommended priority: Scheduled Maintenance

Why this score: CVSS base score 7.5, and Microsoft Exploitability Index: Exploitation Less Likely.

Exploitation status: Neither

Microsoft Exploitability Index: Exploitation Less Likely

CVSS v3.1 base score: 7.5

FIRST EPSS: 0.009 (56.8th pctl) — probability of exploitation in the next 30 days, with its rank across all scored CVEs

CISA KEV: Not currently listed

KB article(s): 5120238, 5120242, 5120229, 5120233, 5120228, 5120418

Affected product(s): 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), Windows Server 2022, Windows Server 2022 (Server Core installation), +6 more

Microsoft Security Update Guide ↗ NVD ↗
CVE-2026-62702 — Windows Graphics Kernel Denial of Service Vulnerability

Denial of Service

EVULNABLE Risk · priority 11/100 Elevated Intelligence coverage 90/100 — no ransomware association data, no CISA KEV listing date

Recommended priority: Scheduled Maintenance

Why this score: CVSS base score 6.8, and Microsoft Exploitability Index: Exploitation Less Likely.

Exploitation status: Neither

Microsoft Exploitability Index: Exploitation Less Likely

CVSS v3.1 base score: 6.8

FIRST EPSS: 0.009 (58.6th pctl) — probability of exploitation in the next 30 days, with its rank across all scored CVEs

CISA KEV: Not currently listed

KB article(s): 5120242, 5120229, 5120249, 5120233, 5120228, 5121003, 5120994, 5120240, 5121000

Affected product(s): Windows Server 2022, Windows Server 2022 (Server Core installation), 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 x64-based Systems, +12 more

Microsoft Security Update Guide ↗ NVD ↗
CVE-2026-59138 — Microsoft Remote Registry Service Denial of Service Vulnerability

Denial of Service

EVULNABLE Risk · priority 11/100 Elevated Intelligence coverage 90/100 — no ransomware association data, no CISA KEV listing date

Recommended priority: Scheduled Maintenance

Why this score: CVSS base score 6.5, and Microsoft Exploitability Index: Exploitation Less Likely.

Exploitation status: Neither

Microsoft Exploitability Index: Exploitation Less Likely

CVSS v3.1 base score: 6.5

FIRST EPSS: 0.010 (61.7th pctl) — probability of exploitation in the next 30 days, with its rank across all scored CVEs

CISA KEV: Not currently listed

KB article(s): 5120238, 5120242, 5120229, 5120249, 5120233, 5120228, 5121003, 5120994, 5120240, 5121000, 5120418, 5120386, 5120385

Affected product(s): 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), Windows Server 2022, Windows Server 2022 (Server Core installation), +24 more

Microsoft Security Update Guide ↗ NVD ↗
CVE-2026-61345 — Microsoft Remote Registry Service Denial of Service Vulnerability

Denial of Service

EVULNABLE Risk · priority 11/100 Elevated Intelligence coverage 90/100 — no ransomware association data, no CISA KEV listing date

Recommended priority: Scheduled Maintenance

Why this score: CVSS base score 6.5, and Microsoft Exploitability Index: Exploitation Less Likely.

Exploitation status: Neither

Microsoft Exploitability Index: Exploitation Less Likely

CVSS v3.1 base score: 6.5

FIRST EPSS: 0.010 (61.7th pctl) — probability of exploitation in the next 30 days, with its rank across all scored CVEs

CISA KEV: Not currently listed

KB article(s): 5120238, 5120242, 5120229, 5120249, 5120233, 5120228, 5121003, 5120994, 5120240, 5121000, 5120418, 5120386, 5120385

Affected product(s): 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), Windows Server 2022, Windows Server 2022 (Server Core installation), +24 more

Microsoft Security Update Guide ↗ NVD ↗
CVE-2026-62912 — Microsoft Exchange Server Denial of Service Vulnerability

Denial of Service

EVULNABLE Risk · priority 11/100 Elevated Intelligence coverage 90/100 — no ransomware association data, no CISA KEV listing date

Recommended priority: Scheduled Maintenance

Why this score: CVSS base score 6.5, and Microsoft Exploitability Index: Exploitation Less Likely.

Exploitation status: Neither

Microsoft Exploitability Index: Exploitation Less Likely

CVSS v3.1 base score: 6.5

FIRST EPSS: 0.013 (68.8th pctl) — probability of exploitation in the next 30 days, with its rank across all scored CVEs

CISA KEV: Not currently listed

KB article(s): 5121573, 5121574, 5121576, 5121575

Affected product(s): Microsoft Exchange Server Subscription Edition RTM, Microsoft Exchange Server 2019 Cumulative Update 15, Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 14

Microsoft Security Update Guide ↗ NVD ↗
CVE-2026-54113 — Remote Procedure Call Denial of Service Vulnerability

Denial of Service

EVULNABLE Risk · priority 10/100 Elevated Intelligence coverage 90/100 — no ransomware association data, no CISA KEV listing date

Recommended priority: Scheduled Maintenance

Why this score: CVSS base score 7.5, and Microsoft Exploitability Index: Exploitation Unlikely.

Exploitation status: Neither

Microsoft Exploitability Index: Exploitation Unlikely

CVSS v3.1 base score: 7.5

FIRST EPSS: 0.011 (64.1st pctl) — probability of exploitation in the next 30 days, with its rank across all scored CVEs

CISA KEV: Not currently listed

KB article(s): 5120238, 5120242, 5120229, 5120249, 5120233, 5120228, 5121003, 5120994, 5120240, 5121000, 5120418, 5120386

Affected product(s): 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), Windows Server 2022, Windows Server 2022 (Server Core installation), +22 more

Microsoft Security Update Guide ↗ NVD ↗
CVE-2026-55015 — Microsoft Remote Help Denial of Service Vulnerability

Denial of Service

EVULNABLE Risk · priority 10/100 Elevated Intelligence coverage 90/100 — no ransomware association data, no CISA KEV listing date

Recommended priority: Scheduled Maintenance

Why this score: CVSS base score 5.5, and Microsoft Exploitability Index: Exploitation Less Likely.

Exploitation status: Neither

Microsoft Exploitability Index: Exploitation Less Likely

CVSS v3.1 base score: 5.5

FIRST EPSS: 0.005 (40.4th pctl) — probability of exploitation in the next 30 days, with its rank across all scored CVEs

CISA KEV: Not currently listed

Affected product(s): Windows Remote Help

Microsoft Security Update Guide ↗ NVD ↗
CVE-2026-70348 — Windows Management Services Denial of Service Vulnerability

Denial of Service

EVULNABLE Risk · priority 10/100 Elevated Intelligence coverage 90/100 — no ransomware association data, no CISA KEV listing date

Recommended priority: Scheduled Maintenance

Why this score: CVSS base score 5.5, and Microsoft Exploitability Index: Exploitation Less Likely.

Exploitation status: Neither

Microsoft Exploitability Index: Exploitation Less Likely

CVSS v3.1 base score: 5.5

FIRST EPSS: 0.004 (35.5th pctl) — probability of exploitation in the next 30 days, with its rank across all scored CVEs

CISA KEV: Not currently listed

KB article(s): 5121003, 5120994, 5121000

Affected product(s): Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 version 26H1 for x64-based Systems, Windows 11 Version 26H1 for ARM64-based Systems

Microsoft Security Update Guide ↗ NVD ↗
CVE-2026-65785 — Windows DHCP Client Denial of Service Vulnerability

Denial of Service

EVULNABLE Risk · priority 8/100 Routine Intelligence coverage 90/100 — no ransomware association data, no CISA KEV listing date

Recommended priority: Monitor

Why this score: CVSS base score 6.5, and Microsoft Exploitability Index: Exploitation Unlikely.

Exploitation status: Neither

Microsoft Exploitability Index: Exploitation Unlikely

CVSS v3.1 base score: 6.5

FIRST EPSS: 0.004 (30.8th pctl) — probability of exploitation in the next 30 days, with its rank across all scored CVEs

CISA KEV: Not currently listed

KB article(s): 5120233, 5120228, 5121003, 5120994, 5121000

Affected product(s): Windows Server 2025 (Server Core installation), Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows Server 2025, +2 more

Microsoft Security Update Guide ↗ NVD ↗
CVE-2026-68819 — Windows Network File System Denial of Service Vulnerability

Denial of Service

EVULNABLE Risk · priority 8/100 Routine Intelligence coverage 90/100 — no ransomware association data, no CISA KEV listing date

Recommended priority: Monitor

Why this score: CVSS base score 5.9, and Microsoft Exploitability Index: Exploitation Unlikely.

Exploitation status: Neither

Microsoft Exploitability Index: Exploitation Unlikely

CVSS v3.1 base score: 5.9

FIRST EPSS: 0.007 (50.1st pctl) — probability of exploitation in the next 30 days, with its rank across all scored CVEs

CISA KEV: Not currently listed

KB article(s): 5120238, 5120242, 5120229, 5120233, 5120228, 5120418, 5120386, 5120385

Affected product(s): 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), Windows Server 2022, Windows Server 2022 (Server Core installation), +10 more

Microsoft Security Update Guide ↗ NVD ↗

Data sources & attribution

Known-exploitation status, required actions, ransomware association and remediation deadlines come from the CISA Known Exploited Vulnerabilities Catalog. Exploitation probability and percentile are provided by FIRST.org's EPSS, used under FIRST's open data terms.

Microsoft Patch Tuesday data is sourced from the Microsoft Security Update Guide; lifecycle milestones from endoflife.date. Linux distribution advisories come from Red Hat, Ubuntu and Debian; vendor bulletins from Adobe, Apple, Chrome, Cisco, Ivanti and Oracle, each linked to its own advisory.