# Microsoft Windows Server 2008 R2 vulnerabilities

Source: https://junglewise.ai/threats/technologies/windows-server-2008-r2  
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-server-2008-r2.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 20 vulnerabilities in Microsoft Windows Server 2008 R2: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-20936, was published on 13 January 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 20 (0 critical, 0 exploited in the wild)

## About Microsoft Windows Server 2008 R2

Server operating system released by Microsoft in 2008.

## Latest Microsoft Windows Server 2008 R2 vulnerabilities

- [CVE-2026-20936: Microsoft Windows NDIS out-of-bounds read](https://junglewise.ai/threats/cve-2026-20936-microsoft-windows-ndis-out-of-bounds-read) (medium, CVSS 4.3, published 13 Jan 2026)
- [CVE-2026-20927: Microsoft Windows SMB Server race condition denial of service](https://junglewise.ai/threats/cve-2026-20927-microsoft-windows-smb-server-race-condition-denial-of-service) (medium, CVSS 5.3, published 13 Jan 2026)
- [CVE-2026-20925: Microsoft Windows NTLM spoofing via external path control](https://junglewise.ai/threats/cve-2026-20925-microsoft-windows-ntlm-spoofing-via-external-path-control) (medium, CVSS 6.5, published 13 Jan 2026)
- [CVE-2026-20922: Microsoft Windows NTFS heap overflow](https://junglewise.ai/threats/cve-2026-20922-microsoft-windows-ntfs-heap-overflow) (high, CVSS 7.8, published 13 Jan 2026)
- [CVE-2026-20875: Microsoft Windows LSASS null pointer dereference denial of service](https://junglewise.ai/threats/cve-2026-20875-microsoft-windows-lsass-null-pointer-dereference-denial-of) (high, CVSS 7.5, published 13 Jan 2026)
- [CVE-2026-20872: Microsoft Windows NTLM spoofing via external file path control](https://junglewise.ai/threats/cve-2026-20872-microsoft-windows-ntlm-spoofing-via-external-file-path-control) (medium, CVSS 6.5, published 13 Jan 2026)
- [CVE-2026-20869: Microsoft Windows race condition in Local Session Manager](https://junglewise.ai/threats/cve-2026-20869-microsoft-windows-race-condition-in-local-session-manager) (high, CVSS 7, published 13 Jan 2026)
- [CVE-2026-20868: Microsoft Windows RRAS heap buffer overflow](https://junglewise.ai/threats/cve-2026-20868-microsoft-windows-rras-heap-buffer-overflow) (high, CVSS 8.8, published 13 Jan 2026)
- [CVE-2026-20860: Microsoft Windows Ancillary Function Driver type confusion privilege escalation](https://junglewise.ai/threats/cve-2026-20860-microsoft-windows-ancillary-function-driver-type-confusion) (high, CVSS 7.8, published 13 Jan 2026)
- [CVE-2026-20849: Microsoft Windows Kerberos privilege escalation via untrusted input](https://junglewise.ai/threats/cve-2026-20849-microsoft-windows-kerberos-privilege-escalation-via-untrusted) (high, CVSS 7.5, published 13 Jan 2026)
- [CVE-2026-20847: Microsoft Windows Shell information disclosure and spoofing](https://junglewise.ai/threats/cve-2026-20847-microsoft-windows-shell-information-disclosure-and-spoofing) (medium, CVSS 6.5, published 13 Jan 2026)
- [CVE-2026-20843: Microsoft Windows RRAS privilege escalation via improper access control](https://junglewise.ai/threats/cve-2026-20843-microsoft-windows-rras-privilege-escalation-via-improper-access) (high, CVSS 7.8, published 13 Jan 2026)
- [CVE-2026-20840: Microsoft Windows NTFS heap overflow local code execution](https://junglewise.ai/threats/cve-2026-20840-microsoft-windows-ntfs-heap-overflow-local-code-execution) (high, CVSS 7.8, published 13 Jan 2026)
- [CVE-2026-20839: Microsoft Windows Client-Side Caching Service improper access control](https://junglewise.ai/threats/cve-2026-20839-microsoft-windows-client-side-caching-service-improper-access) (medium, CVSS 5.5, published 13 Jan 2026)
- [CVE-2026-20834: Microsoft Windows Shell absolute path traversal](https://junglewise.ai/threats/cve-2026-20834-microsoft-windows-shell-absolute-path-traversal) (medium, CVSS 4.6, published 13 Jan 2026)
- [CVE-2026-20831: Microsoft Windows Ancillary Function Driver privilege escalation](https://junglewise.ai/threats/cve-2026-20831-microsoft-windows-ancillary-function-driver-privilege-escalation) (high, CVSS 7.8, published 13 Jan 2026)
- [CVE-2026-20828: Microsoft Windows Internet Connection Sharing out-of-bounds read](https://junglewise.ai/threats/cve-2026-20828-microsoft-windows-internet-connection-sharing-out-of-bounds-read) (medium, CVSS 4.6, published 13 Jan 2026)
- [CVE-2026-20821: Microsoft Windows RPC information disclosure](https://junglewise.ai/threats/cve-2026-20821-microsoft-windows-rpc-information-disclosure) (medium, CVSS 6.2, published 13 Jan 2026)
- [CVE-2026-20820: Microsoft Windows CLFS Driver heap overflow privilege escalation](https://junglewise.ai/threats/cve-2026-20820-microsoft-windows-clfs-driver-heap-overflow-privilege-escalation) (high, CVSS 7.8, published 13 Jan 2026)
- [CVE-2026-20816: Microsoft Windows Installer privilege escalation via TOCTOU race condition](https://junglewise.ai/threats/cve-2026-20816-microsoft-windows-installer-privilege-escalation-via-toctou-race) (high, CVSS 7.8, published 13 Jan 2026)

## Most severe Microsoft Windows Server 2008 R2 vulnerabilities

- [CVE-2026-20868: Microsoft Windows RRAS heap buffer overflow](https://junglewise.ai/threats/cve-2026-20868-microsoft-windows-rras-heap-buffer-overflow) (high, CVSS 8.8, published 13 Jan 2026)
- [CVE-2026-20860: Microsoft Windows Ancillary Function Driver type confusion privilege escalation](https://junglewise.ai/threats/cve-2026-20860-microsoft-windows-ancillary-function-driver-type-confusion) (high, CVSS 7.8, published 13 Jan 2026)
- [CVE-2026-20840: Microsoft Windows NTFS heap overflow local code execution](https://junglewise.ai/threats/cve-2026-20840-microsoft-windows-ntfs-heap-overflow-local-code-execution) (high, CVSS 7.8, published 13 Jan 2026)
- [CVE-2026-20843: Microsoft Windows RRAS privilege escalation via improper access control](https://junglewise.ai/threats/cve-2026-20843-microsoft-windows-rras-privilege-escalation-via-improper-access) (high, CVSS 7.8, published 13 Jan 2026)
- [CVE-2026-20820: Microsoft Windows CLFS Driver heap overflow privilege escalation](https://junglewise.ai/threats/cve-2026-20820-microsoft-windows-clfs-driver-heap-overflow-privilege-escalation) (high, CVSS 7.8, published 13 Jan 2026)
- [CVE-2026-20816: Microsoft Windows Installer privilege escalation via TOCTOU race condition](https://junglewise.ai/threats/cve-2026-20816-microsoft-windows-installer-privilege-escalation-via-toctou-race) (high, CVSS 7.8, published 13 Jan 2026)
- [CVE-2026-20922: Microsoft Windows NTFS heap overflow](https://junglewise.ai/threats/cve-2026-20922-microsoft-windows-ntfs-heap-overflow) (high, CVSS 7.8, published 13 Jan 2026)
- [CVE-2026-20831: Microsoft Windows Ancillary Function Driver privilege escalation](https://junglewise.ai/threats/cve-2026-20831-microsoft-windows-ancillary-function-driver-privilege-escalation) (high, CVSS 7.8, published 13 Jan 2026)
- [CVE-2026-20875: Microsoft Windows LSASS null pointer dereference denial of service](https://junglewise.ai/threats/cve-2026-20875-microsoft-windows-lsass-null-pointer-dereference-denial-of) (high, CVSS 7.5, published 13 Jan 2026)
- [CVE-2026-20849: Microsoft Windows Kerberos privilege escalation via untrusted input](https://junglewise.ai/threats/cve-2026-20849-microsoft-windows-kerberos-privilege-escalation-via-untrusted) (high, CVSS 7.5, published 13 Jan 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 | 0 | 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 | 0 | 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 Server 2008 R2 vulnerabilities", https://junglewise.ai/threats/technologies/windows-server-2008-r2, 11 November 2026.