# Microsoft Windows SMB Client vulnerabilities

Source: https://junglewise.ai/threats/technologies/windows-smb-client  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 11 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/windows-smb-client.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 6 vulnerabilities in Microsoft Windows SMB Client: 2 in the last 7 days and 4 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-119870, was published on 10 November 2026. Nothing was published in the last eight weeks.

## Counts

- Last 7 days: 2
- Last 30 days: 2
- Last 90 days: 4
- All time: 6 (0 critical, 0 exploited in the wild)

## About Microsoft Windows SMB Client

Component in Windows operating systems that handles Server Message Block protocol for network file sharing and communication.

## Latest Microsoft Windows SMB Client vulnerabilities

- [CVE-2026-119870: Windows SMB Client privilege escalation via untrusted pointer dereference](https://junglewise.ai/threats/cve-2026-119870-untrusted-pointer-dereference-in-windows-smb-client-allows-an) (high, CVSS 7, published 10 Nov 2026)
- [CVE-2026-112971: Windows SMB Client heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-112971-heap-based-buffer-overflow-in-windows-smb-client-allows-an) (high, CVSS 7, published 10 Nov 2026)
- [CVE-2026-72936: Microsoft Windows SMB Client use-after-free remote code execution](https://junglewise.ai/threats/cve-2026-72936-microsoft-windows-smb-client-use-after-free-remote-code-execution) (high, CVSS 8.1, published 8 Sep 2026)
- [CVE-2026-69618: Microsoft Windows SMB Client out-of-bounds read](https://junglewise.ai/threats/cve-2026-69618-microsoft-windows-smb-client-out-of-bounds-read) (medium, CVSS 5.5, published 8 Sep 2026)
- [CVE-2026-65794: Microsoft Windows SMB Client buffer over-read](https://junglewise.ai/threats/cve-2026-65794-microsoft-windows-smb-client-buffer-over-read) (medium, CVSS 6.5, published 11 Aug 2026)
- [CVE-2026-40410: Microsoft Windows SMB Client use after free privilege escalation](https://junglewise.ai/threats/cve-2026-40410-microsoft-windows-smb-client-use-after-free-privilege-escalation) (high, CVSS 7, published 12 May 2026)

## Most severe Microsoft Windows SMB Client vulnerabilities

- [CVE-2026-72936: Microsoft Windows SMB Client use-after-free remote code execution](https://junglewise.ai/threats/cve-2026-72936-microsoft-windows-smb-client-use-after-free-remote-code-execution) (high, CVSS 8.1, published 8 Sep 2026)
- [CVE-2026-119870: Windows SMB Client privilege escalation via untrusted pointer dereference](https://junglewise.ai/threats/cve-2026-119870-untrusted-pointer-dereference-in-windows-smb-client-allows-an) (high, CVSS 7, published 10 Nov 2026)
- [CVE-2026-112971: Windows SMB Client heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-112971-heap-based-buffer-overflow-in-windows-smb-client-allows-an) (high, CVSS 7, published 10 Nov 2026)
- [CVE-2026-40410: Microsoft Windows SMB Client use after free privilege escalation](https://junglewise.ai/threats/cve-2026-40410-microsoft-windows-smb-client-use-after-free-privilege-escalation) (high, CVSS 7, published 12 May 2026)
- [CVE-2026-65794: Microsoft Windows SMB Client buffer over-read](https://junglewise.ai/threats/cve-2026-65794-microsoft-windows-smb-client-buffer-over-read) (medium, CVSS 6.5, published 11 Aug 2026)
- [CVE-2026-69618: Microsoft Windows SMB Client out-of-bounds read](https://junglewise.ai/threats/cve-2026-69618-microsoft-windows-smb-client-out-of-bounds-read) (medium, CVSS 5.5, published 8 Sep 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 2 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 2 | 0 | 0 |

## Other Microsoft technologies

- [Microsoft Windows](https://junglewise.ai/threats/technologies/windows): 2,362 vulnerabilities
- [Microsoft Windows 10](https://junglewise.ai/threats/technologies/windows-10): 589 vulnerabilities
- [Microsoft Windows 11 24h2](https://junglewise.ai/threats/technologies/windows-11-24h2): 565 vulnerabilities
- [Microsoft Windows 11 25h2](https://junglewise.ai/threats/technologies/windows-11-25h2): 534 vulnerabilities
- [Microsoft Windows Server 2025](https://junglewise.ai/threats/technologies/windows-server-2025): 534 vulnerabilities
- [Microsoft Windows Server 2022](https://junglewise.ai/threats/technologies/windows-server-2022): 528 vulnerabilities
- [Microsoft Windows Server 2019](https://junglewise.ai/threats/technologies/windows-server-2019): 521 vulnerabilities
- [Microsoft Windows Server 2012](https://junglewise.ai/threats/technologies/windows-server-2012): 517 vulnerabilities
- [Microsoft Windows 11](https://junglewise.ai/threats/technologies/windows-11): 494 vulnerabilities
- [Microsoft Windows Server 2016](https://junglewise.ai/threats/technologies/windows-server-2016): 476 vulnerabilities
- [Microsoft Windows 10 1809](https://junglewise.ai/threats/technologies/windows-10-1809): 380 vulnerabilities
- [Microsoft Windows 10 21h2](https://junglewise.ai/threats/technologies/windows-10-21h2): 373 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Microsoft Windows SMB Client vulnerabilities", https://junglewise.ai/threats/technologies/windows-smb-client, 11 November 2026.