Tcpip.sys in the TCP/IP stack in Microsoft Windows Vista SP2, Windows Server 2008 SP2…
Priority MEDIUM 61CWE-399Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.
Summary
Tcpip.sys in the TCP/IP stack in Microsoft Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote attackers to cause a denial of service (reboot) via a series of crafted ICMP messages, aka "ICMP Denial of Service Vulnerability."
Why it matters now
EPSS 0.38461 98th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:microsoft:windows_7:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_7:-:sp1:x64:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_7:-:sp1:x86:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2008:*:sp2:x32:*:*:*:*:* | all versions | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2008:*:sp2:x64:*:*:*:*:* | all versions | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2008:-:sp2:itanium:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2008:r2:*:itanium:*:*:*:*:* | r2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2008:r2:*:x64:*:*:*:*:* | r2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_vista:*:sp2:*:*:*:*:*:* | all versions | Vulnerable | Microsoft |
- cpe:2.3:o:microsoft:windows_7:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_7:-:sp1:x64:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_7:-:sp1:x86:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2008:*:sp2:x32:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2008:*:sp2:x64:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2008:-:sp2:itanium:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2008:r2:*:itanium:*:*:*:*:* Versions r2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2008:r2:*:x64:*:*:*:*:* Versions r2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_vista:*:sp2:*:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2011-1871
- 2026-10-03 Alias added: GHSA-99xj-9xhx-pcp4
References
More Microsoft Windows 7 vulnerabilities
- TI-2019-00485 Use after free in Microsoft Windows KEVCVSS 3.1CRITICAL 9.8
- TI-2017-06077 Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, Windows Vista… KEVCVSS 3.1CRITICAL 9.8
- TI-2015-01465 HTTP.sys in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8, Windows 8.1… KEVCVSS 3.1CRITICAL 9.8
- TI-2022-19649 Windows Scripting Languages Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2021-17496 Microsoft MSHTML Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2021-13480 Scripting Engine Memory Corruption Vulnerability KEVCVSS 3.1HIGH 8.8
Sources
- CVE-2011-1871 · CVE Program
- CVE-2011-1871 · NVD
- FIRST EPSS
- GHSA-99xj-9xhx-pcp4 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences