{"id":"CVE-2020-11899","published":"2020-06-17T11:15:10Z","modified":"2026-06-17T02:51:00Z","title":"Treck TCP/IP stack Out-of-Bounds Read Vulnerability","vendor":"Treck TCP/IP stack","product":"IPv6","tier":"core","eol":null,"description":{"text":"The Treck TCP/IP stack before 6.0.1.66 has an IPv6 Out-of-bounds Read.","provenance":"source","from":"NVD"},"summary":{"text":"The Treck TCP/IP stack's IPv6 component contains an out-of-bounds read flaw in releases before 6.0.1.66. An attacker on an adjacent network segment, without needing credentials or user interaction, can trigger the out-of-bounds read to disrupt integrity and availability of the affected system.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:11:57Z"},"cvss":{"score":5.4,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","provenance":"source","from":"NVD"},"epss":{"score":0.1842,"percentile":0.97223,"date":"2026-10-28","provenance":"source"},"kev":{"dateAdded":"2022-03-03","dueDate":"2022-03-17","ransomware":false,"requiredAction":"Apply updates per vendor instructions.","notes":"https://nvd.nist.gov/vuln/detail/CVE-2020-11899","provenance":"source"},"vulncheckKev":{"dateAdded":"2022-03-03","exploitedFirstSeen":"2022-03-03","ransomware":false,"evidence":[{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2022-03-03"},{"url":"https://cyble.com/blog/cyble-sensors-detect-attacks-on-java-framework-iot-devices/","date":"2024-10-22"},{"url":"https://cyble.com/blog/weekly-cyble-vulnerability-blog/","date":"2025-06-10"}],"evidenceTotal":3,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"references":[{"url":"http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-006.txt","tags":["Broken Link","Third Party Advisory"]},{"url":"https://cwe.mitre.org/data/definitions/125.html","tags":["Technical Description"]},{"url":"https://jsof-tech.com/vulnerability-disclosure-policy/","tags":["Broken Link","Third Party Advisory"]},{"url":"https://security.netapp.com/advisory/ntap-20200625-0006/","tags":["Third Party Advisory"]},{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-treck-ip-stack-JyBQ5GyC","tags":["Third Party Advisory"]},{"url":"https://www.dell.com/support/article/de-de/sln321836/dell-response-to-the-ripple20-vulnerabilities","tags":["Third Party Advisory"]},{"url":"https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00295.html","tags":["Third Party Advisory"]},{"url":"https://www.jsof-tech.com/ripple20/","tags":["Broken Link","Exploit","Third Party Advisory"]},{"url":"https://www.kb.cert.org/vuls/id/257161","tags":["Third Party Advisory","US Government Resource"]},{"url":"https://www.kb.cert.org/vuls/id/257161/","tags":["Mitigation","Third Party Advisory","US Government Resource"]},{"url":"https://www.treck.com","tags":["Product","Vendor Advisory"]},{"url":"http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-006.txt","tags":["Broken Link","Third Party Advisory"]},{"url":"https://cwe.mitre.org/data/definitions/125.html","tags":["Technical Description"]},{"url":"https://jsof-tech.com/vulnerability-disclosure-policy/","tags":["Broken Link","Third Party Advisory"]},{"url":"https://security.netapp.com/advisory/ntap-20200625-0006/","tags":["Third Party Advisory"]},{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-treck-ip-stack-JyBQ5GyC","tags":["Third Party Advisory"]},{"url":"https://www.dell.com/support/article/de-de/sln321836/dell-response-to-the-ripple20-vulnerabilities","tags":["Third Party Advisory"]},{"url":"https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00295.html","tags":["Third Party Advisory"]},{"url":"https://www.jsof-tech.com/ripple20/","tags":["Broken Link","Exploit","Third Party Advisory"]},{"url":"https://www.kb.cert.org/vuls/id/257161","tags":["Third Party Advisory","US Government Resource"]},{"url":"https://www.kb.cert.org/vuls/id/257161/","tags":["Mitigation","Third Party Advisory","US Government Resource"]},{"url":"https://www.treck.com","tags":["Product","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-11899","tags":["US Government Resource"]}],"techniques":[{"id":"T1190","name":"Exploit Public-Facing Application","tactics":["initial-access"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Remote IPv6 packets reach the vulnerable network stack","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"The Treck TCP/IP stack before 6.0.1.66 has an IPv6 Out-of-bounds Read","start":0,"end":69}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1499.004","name":"Application or System Exploitation","tactics":["impact"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Memory read errors can crash the networking stack","mappingType":"primary_impact","evidence":[{"from":"description","quote":"has an IPv6 Out-of-bounds Read","start":39,"end":69}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2020-4236","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-4236","exploited":true,"exploitedSince":"2022-03-03","provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":["https://www.jsof-tech.com/ripple20/"],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1499.004"],"provenance":"ai"}],"timeline":[{"date":"2020-06-17","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-11899","provenance":"source"},{"date":"2022-03-03","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","provenance":"source"},{"date":"2022-03-03","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2022-03-03","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-4236","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":624},"priority":{"score":66.2,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 1701 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.44,"detail":"percentile 0.9722"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 NVD reference tagged Exploit"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":3.78,"detail":"base score 5.4"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}