{"id":"CVE-2020-8196","published":"2020-07-10T16:15:12Z","modified":"2026-06-17T03:26:02Z","title":"Citrix ADC, Gateway, and SD-WAN WANOP Appliance Information Disclosure Vulnerability","vendor":"Citrix","product":"Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance","tier":"core","eol":null,"description":{"text":"Improper access control in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP versions before 11.1.1a, 11.0.3d and 10.2.7 resulting in limited information disclosure to low privileged users.","provenance":"source","from":"NVD"},"summary":{"text":"Citrix ADC, Citrix Gateway, and Citrix SD-WAN WANOP appliances contain an improper access control flaw that allows limited information disclosure. An attacker with network access to the affected appliance and a low-privileged user account can exploit it without any user interaction to read information they should not be able to see.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:12:24Z"},"cvss":{"score":4.3,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","provenance":"source","from":"NVD"},"epss":{"score":0.26333,"percentile":0.98,"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-2020-8196","provenance":"source"},"vulncheckKev":{"dateAdded":"2020-09-15","exploitedFirstSeen":"2020-09-15","ransomware":true,"evidence":[{"url":"https://us-cert.cisa.gov/ncas/analysis-reports/ar20-259a","date":"2020-09-15"},{"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.paloaltonetworks.com/content/dam/pan/en_US/assets/pdf/reports/2022-unit42-ransomware-threat-report-final.pdf","date":"2022-03-24"},{"url":"https://static.tenable.com/marketing/whitepapers/Whitepaper-Ransomware_Ecosystem.pdf","date":"2022-06-22"},{"url":"https://cert-in.org.in/PDF/RANSOMWARE_Report_2022.pdf","date":"2023-04-22"}],"evidenceTotal":8,"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-287","name":"Improper Authentication"},{"id":"CWE-284","name":"Improper Access Control"}],"references":[{"url":"http://packetstormsecurity.com/files/160047/Citrix-ADC-NetScaler-Local-File-Inclusion.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"https://support.citrix.com/article/CTX276688","tags":["Vendor Advisory"]},{"url":"http://packetstormsecurity.com/files/160047/Citrix-ADC-NetScaler-Local-File-Inclusion.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"https://support.citrix.com/article/CTX276688","tags":["Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-8196","tags":["US Government Resource"]}],"techniques":[{"id":"T1056","name":"Input Capture","tactics":["collection","credential-access"],"provenance":"source","basis":"ctid-kev","bases":["ctid-kev"],"basisDetail":"CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Improper Access Control","mappingType":"exploitation_technique","evidence":[],"comment":"CVE-2020-8196\n is an information disclosure in Citrix ADC, Gateway, and SD-WAN WANOP Appliance which allows attacker to access sensitive information via crafted requests.","confidence":"high"},{"id":"T1082","name":"System Information Discovery","tactics":["discovery"],"provenance":"source","basis":"ctid-kev","bases":["ctid-kev"],"basisDetail":"CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Improper Access Control","mappingType":"primary_impact","evidence":[],"comment":"CVE-2020-8196\n is an information disclosure in Citrix ADC, Gateway, and SD-WAN WANOP Appliance which allows attacker to access sensitive information via crafted requests.","confidence":"high"},{"id":"T1005","name":"Data from Local System","tactics":["collection"],"provenance":"source","basis":"ctid-kev","bases":["ctid-kev"],"basisDetail":"CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Improper Access Control","mappingType":"secondary_impact","evidence":[],"comment":"CVE-2020-8196\n is an information disclosure in Citrix ADC, Gateway, and SD-WAN WANOP Appliance which allows attacker to access sensitive information via crafted requests.","confidence":"high"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2020-29073","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-29073","exploited":true,"exploitedSince":"2021-11-03","provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":["http://packetstormsecurity.com/files/160047/Citrix-ADC-NetScaler-Local-File-Inclusion.html"],"flow":[{"stage":"exploitation","techniques":["T1056"],"provenance":"source"},{"stage":"primary","techniques":["T1082"],"provenance":"source"},{"stage":"secondary","techniques":["T1005"],"provenance":"source"}],"timeline":[{"date":"2020-07-10","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-8196","provenance":"source"},{"date":"2020-09-15","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://us-cert.cisa.gov/ncas/analysis-reports/ar20-259a","provenance":"source"},{"date":"2021-11-03","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2021-11-03","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-29073","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":481},"priority":{"score":75.6,"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 2235 days ago"},{"name":"Known ransomware use","points":10.0,"detail":"CISA KEV and VulnCheck KEV: Known"},{"name":"EPSS percentile","points":19.6,"detail":"percentile 0.9800"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 NVD exploit link"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":3.01,"detail":"base score 4.3"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}