Technology · Microsoft
Microsoft Windows Server vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 16 vulnerabilities in Microsoft Windows Server: 0 in the last 7 days and 5 in the last 90 days, 3 of them critical and 2 exploited in the wild. The most recent, CVE-2026-77499, was published on 8 September 2026.
- Last 7 days
- 0
- Last 90 days
- 5
- Critical, all time
- 3
- Exploited in the wild
- 2
About Microsoft Windows Server
A server operating system developed by Microsoft for enterprise-level management, data storage, and application hosting.
Latest Microsoft Windows Server vulnerabilities
- CVE-2026-77499: Microsoft Windows DHCP Server type confusion denial of servicehighCVSS 7.5EPSS 1.2%
- CVE-2026-69821: Microsoft Active Directory Certificate Services privilege escalationhighCVSS 7.8EPSS 0.3%
- CVE-2026-62810: Microsoft Active Directory Certificate Services heap overflowhighCVSS 7.8EPSS 0.3%
- CVE-2026-56177: Microsoft Windows Server use-after-free privilege escalationhighCVSS 7.8EPSS 0.3%
- CVE-2026-50362: Microsoft Windows ReFS heap overflowhighCVSS 7.8
- CVE-2026-41089: Microsoft Windows stack-based buffer overflow in NetlogoncriticalCVSS 9.8
- CVE-2026-40414: Microsoft Windows TCP/IP null pointer dereference denial of servicehighCVSS 7.4EPSS 0.1%
- CVE-2026-40413: Microsoft Windows TCP/IP null pointer dereference denial of servicehighCVSS 7.4EPSS 0.1%
- CVE-2026-40401: Microsoft Windows TCP/IP denial of service via null pointer dereferencehighCVSS 7.1EPSS 0.1%
- CVE-2026-34351: Microsoft Windows TCP/IP race condition privilege escalationhighCVSS 7.8
- CVE-2026-34330: Microsoft Windows Win32K race condition in GRFX componenthighCVSS 7.8EPSS 0.1%
- CVE-2026-25180: Microsoft Graphics Component out-of-bounds readmediumCVSS 5.5EPSS 0.0%
- CVE-2026-24285: Microsoft Windows Win32K use after free privilege escalationhighCVSS 7EPSS 0.0%
- CVE-2026-21519: Microsoft Windows type confusion in Desktop Window Managercriticalexploited in the wildCVSS 7.8EPSS 4.5%
- CVE-2025-62221: Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.criticalexploited in the wildCVSS 7.8EPSS 2.5%
- CVE-2025-53799: Microsoft Windows Imaging Component information disclosuremediumCVSS 5.5EPSS 0.1%
Most severe Microsoft Windows Server vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-21519: Microsoft Windows type confusion in Desktop Window Managercriticalexploited in the wildCVSS 7.8EPSS 4.5%
- CVE-2025-62221: Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.criticalexploited in the wildCVSS 7.8EPSS 2.5%
- CVE-2026-41089: Microsoft Windows stack-based buffer overflow in NetlogoncriticalCVSS 9.8
- CVE-2026-62810: Microsoft Active Directory Certificate Services heap overflowhighCVSS 7.8EPSS 0.3%
- CVE-2026-69821: Microsoft Active Directory Certificate Services privilege escalationhighCVSS 7.8EPSS 0.3%
- CVE-2026-56177: Microsoft Windows Server use-after-free privilege escalationhighCVSS 7.8EPSS 0.3%
- CVE-2026-34330: Microsoft Windows Win32K race condition in GRFX componenthighCVSS 7.8EPSS 0.1%
- CVE-2026-50362: Microsoft Windows ReFS heap overflowhighCVSS 7.8
- CVE-2026-34351: Microsoft Windows TCP/IP race condition privilege escalationhighCVSS 7.8
- CVE-2026-77499: Microsoft Windows DHCP Server type confusion denial of servicehighCVSS 7.5EPSS 1.2%
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 1 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 4 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/windows-server.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Microsoft Windows Server vulnerabilities", https://junglewise.ai/threats/technologies/windows-server, 26 September 2026.