{"cve":"CVE-2011-1871","nvd":{"published":"2011-08-10T21:55:01.187","modified":"2026-06-16T23:30:16.710","status":"Modified","description":"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.\"","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-399"],"references":["http://www.us-cert.gov/cas/techalerts/TA11-221A.html","https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-064","https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12971","http://www.us-cert.gov/cas/techalerts/TA11-221A.html","https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-064"],"products":["microsoft:windows_7","microsoft:windows_server_2008","microsoft:windows_vista"],"source":"nvd","synced_at":"2026-10-19T19:58:50.521460154+00:00"},"epss":{"cve":"CVE-2011-1871","score":0.38461,"percentile":0.98571,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}