{"id":"CVE-2020-2555","published":"2020-01-15T17:15:17Z","modified":"2026-06-17T03:12:20Z","title":"Oracle Multiple Products Remote Code Execution Vulnerability","vendor":"Oracle","product":"Multiple Products","tier":"core","eol":null,"description":{"text":"Vulnerability in the Oracle Coherence product of Oracle Fusion Middleware (component: Caching,CacheStore,Invocation). Supported versions that are affected are 3.7.1.0, 12.1.3.0.0, 12.2.1.3.0 and 12.2.1.4.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via T3 to compromise Oracle Coherence. Successful attacks of this vulnerability can result in takeover of Oracle Coherence. CVSS 3.0 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).","provenance":"source","from":"NVD"},"summary":{"text":"A deserialization flaw in the Caching, CacheStore and Invocation components of Oracle Coherence, which is part of Oracle Fusion Middleware. An unauthenticated attacker with network access over the T3 protocol can exploit it without user interaction to take over Oracle Coherence.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:09:38Z"},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.97116,"percentile":0.99893,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","ransomware":false,"requiredAction":"Apply updates per vendor instructions.","notes":"https://nvd.nist.gov/vuln/detail/CVE-2020-2555","provenance":"source"},"vulncheckKev":{"dateAdded":"2020-10-20","exploitedFirstSeen":"2020-10-20","ransomware":false,"evidence":[{"url":"https://cisa.gov/news-events/cybersecurity-advisories/aa20-275a","date":"2020-10-20"},{"url":"https://media.defense.gov/2020/Oct/20/2002519884/-1/-1/0/CSA_CHINESE_EXPLOIT_VULNERABILITIES_UOO179811.PDF","date":"2020-10-20"},{"url":"https://us-cert.cisa.gov/ncas/alerts/aa20-275a","date":"2020-10-20"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2021-11-03"},{"url":"https://www.securin.io/wp-content/uploads/2023/08/2023-State-of-Cybersecurity-for-Medical-Devices-and-Healthcare-Systems.pdf","date":"2023-08-08"}],"evidenceTotal":5,"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-502","name":"Deserialization of Untrusted Data"}],"references":[{"url":"http://packetstormsecurity.com/files/157054/Oracle-Coherence-Fusion-Middleware-Remote-Code-Execution.html","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/157207/Oracle-WebLogic-Server-12.2.1.4.0-Remote-Code-Execution.html","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/157795/WebLogic-Server-Deserialization-Remote-Code-Execution.html","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://www.oracle.com/security-alerts/cpujan2020.html","tags":["Vendor Advisory"]},{"url":"https://www.oracle.com/security-alerts/cpujan2021.html","tags":["Vendor Advisory"]},{"url":"https://www.oracle.com/security-alerts/cpujul2020.html","tags":["Vendor Advisory"]},{"url":"https://www.oracle.com/security-alerts/cpujul2021.html","tags":["Patch","Vendor Advisory"]},{"url":"https://www.oracle.com/security-alerts/cpuoct2020.html","tags":["Patch","Vendor Advisory"]},{"url":"http://packetstormsecurity.com/files/157054/Oracle-Coherence-Fusion-Middleware-Remote-Code-Execution.html","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/157207/Oracle-WebLogic-Server-12.2.1.4.0-Remote-Code-Execution.html","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/157795/WebLogic-Server-Deserialization-Remote-Code-Execution.html","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://www.oracle.com/security-alerts/cpujan2020.html","tags":["Vendor Advisory"]},{"url":"https://www.oracle.com/security-alerts/cpujan2021.html","tags":["Vendor Advisory"]},{"url":"https://www.oracle.com/security-alerts/cpujul2020.html","tags":["Vendor Advisory"]},{"url":"https://www.oracle.com/security-alerts/cpujul2021.html","tags":["Patch","Vendor Advisory"]},{"url":"https://www.oracle.com/security-alerts/cpuoct2020.html","tags":["Patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-2555","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: Unauthenticated network exploit of exposed service","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"Easily exploitable vulnerability allows unauthenticated attacker with network access via T3","start":207,"end":298}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1059","name":"Command and Scripting Interpreter","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Deserialization yields code execution on host","mappingType":"primary_impact","evidence":[{"from":"description","quote":"Successful attacks of this vulnerability can result in takeover of Oracle Coherence","start":331,"end":414}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2020-22348","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-22348","exploited":true,"exploitedSince":"2021-11-03","provenance":"source"},"exploits":[{"id":48320,"url":"https://www.exploit-db.com/exploits/48320","title":"Oracle WebLogic Server 12.2.1.4.0 - Remote Code Execution","type":"webapps","platform":"java","date":"2020-04-14","verified":false,"provenance":"source"},{"id":48508,"url":"https://www.exploit-db.com/exploits/48508","title":"WebLogic Server - Deserialization RCE - BadAttributeValueExpException (Metasploit)","type":"remote","platform":"multiple","date":"2020-05-22","verified":true,"provenance":"source"}],"exploitSources":{"exploitdb":{"count":2,"earliest":"2020-04-14"},"pocGithub":{"count":5,"skipped":0,"earliest":"2020-03-06","earliestUrl":"https://github.com/Hu3sky/CVE-2020-2555","repos":[{"name":"Y4er/CVE-2020-2555","url":"https://github.com/Y4er/CVE-2020-2555","stars":177,"created":"2020-03-07"},{"name":"wsfengfan/CVE-2020-2555","url":"https://github.com/wsfengfan/CVE-2020-2555","stars":45,"created":"2020-03-06"},{"name":"Maskhe/cve-2020-2555","url":"https://github.com/Maskhe/cve-2020-2555","stars":14,"created":"2020-03-10"},{"name":"Hu3sky/CVE-2020-2555","url":"https://github.com/Hu3sky/CVE-2020-2555","stars":3,"created":"2020-03-06"},{"name":"Qynklee/POC_CVE-2020-2555","url":"https://github.com/Qynklee/POC_CVE-2020-2555","stars":1,"created":"2021-11-15"}]},"metasploit":[{"name":"WebLogic Server Deserialization RCE - BadAttributeValueExpException","module":"exploit/multi/misc/weblogic_deserialize_badattrval","type":"exploit","disclosureDate":"2020-01-15","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/misc/weblogic_deserialize_badattrval.rb"}],"first":{"date":"2020-01-15","source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/misc/weblogic_deserialize_badattrval.rb"},"provenance":"source"},"exploitRefs":["http://packetstormsecurity.com/files/157054/Oracle-Coherence-Fusion-Middleware-Remote-Code-Execution.html","http://packetstormsecurity.com/files/157207/Oracle-WebLogic-Server-12.2.1.4.0-Remote-Code-Execution.html","http://packetstormsecurity.com/files/157795/WebLogic-Server-Deserialization-Remote-Code-Execution.html"],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1059"],"provenance":"ai"}],"timeline":[{"date":"2020-01-15","kind":"published","label":"Published 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