Microsoft
Windows Server
Microsoft server operating system for on-premises and hybrid workloads.
2026-05 B (26100.32860)
- Release date
- May 12, 2026
- Security status
- 25 high-severity CVEs tracked in the last 90 days. Current version not affected.
Source
Vendor Release Information
Public release notes are linked for the latest stored release.
Release history
See the latest published releases stored for this product.
| Version | Published | Notes |
|---|---|---|
| 2026-05 B (26100.32860) | 2026-05-12 | Release Notes |
| 2026-04 OOB (26100.32698) | 2026-04-19 | Release Notes |
| 2026-04 B (26100.32690) | 2026-04-14 | Release Notes |
| 2026-03 B (26100.32522) | 2026-03-10 | Release Notes |
Vulnerability tracking
versionPing monitors CVEs for this product. Matching CVEs are listed below. We only display CVEs with a CVSS score of 7.0 or higher that were published within the last 90 days.
Affected status is inferred from published affected version ranges where available. Always verify against the vendor advisory before making production decisions.
| CVE | Severity | Published | Status | Summary |
|---|---|---|---|---|
| CVE-2026-42896 | HIGH (7.8) | 2026-05-12 | Current versionnot affected | Integer overflow or wraparound in Windows DWM Core Library allows an authorized attacker to elevate privileges locally. Affected versions
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| CVE-2026-42825 | HIGH (7.0) | 2026-05-12 | Current versionnot affected | Use after free in Windows Telephony Service allows an authorized attacker to elevate privileges locally. Affected versions
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| CVE-2026-41096 | CRITICAL (9.8) | 2026-05-12 | Current versionnot affected | Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network. Affected versions
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| CVE-2026-41095 | HIGH (7.8) | 2026-05-12 | Current versionnot affected | Use after free in Data Deduplication allows an authorized attacker to elevate privileges locally. Affected versions
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| CVE-2026-41089 | CRITICAL (9.8) | 2026-05-12 | Current versionnot affected | Stack-based buffer overflow in Windows Netlogon allows an unauthorized attacker to execute code over a network. Affected versions
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| CVE-2026-41088 | HIGH (7.8) | 2026-05-12 | Current versionnot affected | Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally. Affected versions
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| CVE-2026-40415 | HIGH (8.1) | 2026-05-12 | Current versionnot affected | Use after free in Windows TCP/IP allows an unauthorized attacker to execute code over a network. Affected versions
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| CVE-2026-40414 | HIGH (7.4) | 2026-05-12 | Current versionnot affected | Windows TCP/IP Denial of Service Vulnerability Affected versions
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| CVE-2026-40413 | HIGH (7.4) | 2026-05-12 | Current versionnot affected | Windows TCP/IP Denial of Service Vulnerability Affected versions
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| CVE-2026-40410 | HIGH (7.0) | 2026-05-12 | Current versionnot affected | Use after free in Windows SMB Client allows an authorized attacker to elevate privileges locally. Affected versions
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| CVE-2026-40408 | HIGH (7.8) | 2026-05-12 | Current versionnot affected | Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally. Affected versions
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| CVE-2026-40407 | HIGH (7.8) | 2026-05-12 | Current versionnot affected | Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally. Affected versions
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| CVE-2026-40406 | HIGH (7.5) | 2026-05-12 | Current versionnot affected | Use after free in Windows TCP/IP allows an unauthorized attacker to disclose information over a network. Affected versions
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| CVE-2026-40405 | HIGH (7.5) | 2026-05-12 | Current versionnot affected | Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over a network. Affected versions
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| CVE-2026-40403 | HIGH (8.8) | 2026-05-12 | Current versionnot affected | Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to execute code locally. Affected versions
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| CVE-2026-40401 | HIGH (7.1) | 2026-05-12 | Current versionnot affected | Windows TCP/IP Denial of Service Vulnerability Affected versions
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| CVE-2026-40399 | HIGH (7.8) | 2026-05-12 | Current versionnot affected | Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally. Affected versions
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| CVE-2026-40398 | HIGH (7.8) | 2026-05-12 | Current versionnot affected | Heap-based buffer overflow in Windows Remote Desktop allows an authorized attacker to elevate privileges locally. Affected versions
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| CVE-2026-40397 | HIGH (7.8) | 2026-05-12 | Current versionnot affected | Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally. Affected versions
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| CVE-2026-40382 | HIGH (7.8) | 2026-05-12 | Current versionnot affected | Use after free in Windows Telephony Service allows an authorized attacker to elevate privileges locally. Affected versions
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| CVE-2026-40377 | HIGH (7.8) | 2026-05-12 | Current versionnot affected | Heap-based buffer overflow in Windows Cryptographic Services allows an authorized attacker to elevate privileges locally. Affected versions
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| CVE-2026-40369 | HIGH (7.8) | 2026-05-12 | Current versionnot affected | Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally. Affected versions
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| CVE-2026-35424 | HIGH (7.5) | 2026-05-12 | Current versionnot affected | Missing release of memory after effective lifetime in Windows Internet Key Exchange (IKE) Protocol allows an unauthorized attacker to deny service over a network. Affected versions
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| CVE-2026-35421 | HIGH (7.8) | 2026-05-12 | Current versionnot affected | Heap-based buffer overflow in Windows GDI allows an unauthorized attacker to execute code locally. Affected versions
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| CVE-2026-35420 | HIGH (7.8) | 2026-05-12 | Current versionnot affected | Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally. Affected versions
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