Tcpip.sys in the TCP/IP stack in Microsoft Windows 7 Gold and SP1 and Windows Server 2008 R2 and R2 SP1 does not properly implement URL-based QoS, which allows remote attackers to cause a denial of service (reboot) via a crafted URL to a web server, aka "TCP/IP QOS Denial of Service Vulnerability."
Published Aug 10, 2011
7.1
HIGHCVSS 2.0
EPSS 24.93%
Description
Tcpip.sys in the TCP/IP stack in Microsoft Windows 7 Gold and SP1 and Windows Server 2008 R2 and R2 SP1 does not properly implement URL-based QoS, which allows remote attackers to cause a denial of service (reboot) via a crafted URL to a web server, aka "TCP/IP QOS Denial of Service Vulnerability."
Affected products
No data.
- n/a
- n/a
- n/a
- r2
- r2
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (23 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 24.93% (0.24935) | 97.85th | v5 (v2026.06.15) |
| Jun 15, 2026 | 25.55% (0.25545) | 97.68th | v5 (v2026.06.15) |
| Oct 18, 2025 | 67.11% (0.67109) | 98.48th | v4 (v2025.03.14) |
| Sep 14, 2025 | 74.35% (0.74346) | 98.80th | v4 (v2025.03.14) |
| Mar 30, 2025 | 76.34% (0.76338) | 98.87th | v4 (v2025.03.14) |
| Mar 29, 2025 | 77.48% (0.77481) | 98.68th | v4 (v2025.03.14) |
| Mar 17, 2025 | 76.34% (0.76338) | 98.88th | v4 (v2025.03.14) |
| Dec 17, 2024 | 89.92% (0.89920) | 99.04th | v3 (v2023.03.01) |
| Dec 12, 2024 | 93.33% (0.93330) | 99.19th | v3 (v2023.03.01) |
| Oct 10, 2024 | 94.21% (0.94212) | 99.25th | v3 (v2023.03.01) |
| Aug 26, 2024 | 92.65% (0.92651) | 99.06th | v3 (v2023.03.01) |
| Jul 8, 2024 | 94.21% (0.94212) | 99.20th | v3 (v2023.03.01) |
| May 19, 2024 | 93.65% (0.93651) | 99.10th | v3 (v2023.03.01) |
| Mar 30, 2024 | 93.77% (0.93774) | 99.08th | v3 (v2023.03.01) |
| Feb 8, 2024 | 93.07% (0.93071) | 98.96th | v3 (v2023.03.01) |
| Oct 23, 2023 | 96.06% (0.96059) | 99.30th | v3 (v2023.03.01) |
| Jul 6, 2023 | 96.60% (0.96601) | 99.41th | v3 (v2023.03.01) |
| May 9, 2023 | 96.53% (0.96533) | 99.34th | v3 (v2023.03.01) |
| Mar 10, 2023 | 96.50% (0.96498) | 99.27th | v3 (v2023.03.01) |
| Mar 7, 2023 | 96.54% (0.96539) | 99.28th | v3 (v2023.03.01) |
| Mar 6, 2023 | 30.94% (0.30944) | 97.54th | v2 (v2022.01.01) |
| Jul 13, 2022 | 30.94% (0.30944) | 97.42th | v2 (v2022.01.01) |
| Feb 4, 2022 | 36.31% (0.36314) | 96.99th | v2 (v2022.01.01) |
References (4)
- http://securityreason.com/securityalert/8474 third-party-advisoryx_refsource_SREASON
- http://www.us-cert.gov/cas/techalerts/TA11-221A.html third-party-advisoryx_refsource_CERTUS Government Resource
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-064 vendor-advisoryx_refsource_MS
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12318 vdb-entrysignaturex_refsource_OVAL
| Link | Providers | Tags |
|---|---|---|
| http://securityreason.com/securityalert/8474 | third-party-advisoryx_refsource_SREASON | |
| http://www.us-cert.gov/cas/techalerts/TA11-221A.html | third-party-advisoryx_refsource_CERTUS Government Resource | |
| https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-064 | vendor-advisoryx_refsource_MS | |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12318 | vdb-entrysignaturex_refsource_OVAL |
Change history (0)
No recorded changes yet.