{"id":"CVE-2020-8193","published":"2020-07-10T16:15:12Z","modified":"2026-06-17T03:26:01Z","title":"Citrix ADC, Gateway, and SD-WAN WANOP Appliance Authorization Bypass 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 allows unauthenticated access to certain URL endpoints.","provenance":"source","from":"NVD"},"summary":{"text":"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), along with Citrix SDWAN WAN-OP appliances (versions before 11.1.1a, 11.0.3d and 10.2.7), contain an improper access control flaw that lets requests reach certain URL endpoints without authentication. An unauthenticated attacker with network access to the affected appliance can reach those endpoints directly, with no user interaction or special configuration required.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:11:21Z"},"cvss":{"score":6.5,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","provenance":"source","from":"NVD"},"epss":{"score":0.88269,"percentile":0.99768,"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-2020-8193","provenance":"source"},"vulncheckKev":{"dateAdded":"2020-09-15","exploitedFirstSeen":"2020-09-15","ransomware":false,"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://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2023-11-14&host_type=src&vulnerability=cve-2020-8193","date":"2023-11-14"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2023-11-15&host_type=src&vulnerability=cve-2020-8193","date":"2023-11-15"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2023-11-16&host_type=src&vulnerability=cve-2020-8193","date":"2023-11-16"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2023-11-17&host_type=src&vulnerability=cve-2020-8193","date":"2023-11-17"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2023-11-19&host_type=src&vulnerability=cve-2020-8193","date":"2023-11-19"}],"evidenceTotal":698,"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":["Exploit","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":["Exploit","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-2020-8193","tags":["US Government Resource"]}],"techniques":[{"id":"T1556","name":"Modify Authentication Process","tactics":["credential-access","defense-impairment","persistence"],"provenance":"source","basis":"ctid-kev","bases":["ctid-kev"],"basisDetail":"CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Authentication Bypass","mappingType":"exploitation_technique","evidence":[],"comment":"CVE-2020-8193 is an Authorization Bypass vulnerability in Citrix ADC, Gateway, and SD-WAN WANOP Appliance in various versions allows attacker to bypass authentication mechanisms 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: Authentication Bypass","mappingType":"primary_impact","evidence":[],"comment":"CVE-2020-8193 is an Authorization Bypass vulnerability in Citrix ADC, Gateway, and SD-WAN WANOP Appliance in various versions allows attacker to bypass authentication mechanisms via crafted requests.","confidence":"high"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2020-29070","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-29070","exploited":true,"exploitedSince":"2021-11-03","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":5,"skipped":0,"earliest":"2020-07-10","earliestUrl":"https://github.com/jas502n/CVE-2020-8193","repos":[{"name":"jas502n/CVE-2020-8193","url":"https://github.com/jas502n/CVE-2020-8193","stars":88,"created":"2020-07-10"},{"name":"Airboi/Citrix-ADC-RCE-CVE-2020-8193","url":"https://github.com/Airboi/Citrix-ADC-RCE-CVE-2020-8193","stars":45,"created":"2020-07-12"},{"name":"PR3R00T/CVE-2020-8193-Citrix-Scanner","url":"https://github.com/PR3R00T/CVE-2020-8193-Citrix-Scanner","stars":8,"created":"2020-07-13"},{"name":"Zeop-CyberSec/citrix_adc_netscaler_lfi","url":"https://github.com/Zeop-CyberSec/citrix_adc_netscaler_lfi","stars":6,"created":"2020-07-12"},{"name":"ctlyz123/CVE-2020-8193","url":"https://github.com/ctlyz123/CVE-2020-8193","stars":2,"created":"2020-07-15"}]},"nuclei":[{"id":"CVE-2020-8193","name":"Citrix - Local File Inclusion","severity":"medium","path":"http/cves/2020/CVE-2020-8193.yaml","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2020/CVE-2020-8193.yaml"}],"first":{"date":"2020-07-10","source":"PoC-in-GitHub","url":"https://github.com/jas502n/CVE-2020-8193"},"provenance":"source"},"detections":{"cveRules":[{"title":"Citrix ADS Exploitation CVE-2020-8193 CVE-2020-8195","id":"0d0d9a8a-a49e-4e27-b061-7ce4b936cfb7","level":"critical","status":"test","path":"rules-emerging-threats/2020/Exploits/CVE-2020-8193/web_cve_2020_8193_8195_citrix_exploit.yml","url":"https://github.com/SigmaHQ/sigma/blob/master/rules-emerging-threats/2020/Exploits/CVE-2020-8193/web_cve_2020_8193_8195_citrix_exploit.yml","techniques":["T1190"]}]},"exploitRefs":["http://packetstormsecurity.com/files/160047/Citrix-ADC-NetScaler-Local-File-Inclusion.html"],"flow":[{"stage":"exploitation","techniques":["T1556"],"provenance":"source"},{"stage":"primary","techniques":["T1005"],"provenance":"source"}],"timeline":[{"date":"2020-07-10","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-8193","provenance":"source"},{"date":"2020-07-10","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub","url":"https://github.com/jas502n/CVE-2020-8193","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-2020-29070","provenance":"source"}],"speed":{"daysToPublicExploit":0,"firstExploitFrom":"PoC-in-GitHub","daysToKev":481},"priority":{"score":67.5,"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":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.95,"detail":"percentile 0.9977"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 NVD reference tagged Exploit; 5 PoC-in-GitHub repos; 1 nuclei template"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":4.55,"detail":"base score 6.5"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}