{"schema_version":1,"title":"Synacor Zimbra Collaboration Suite (ZCS) vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 19 vulnerabilities in Synacor Zimbra Collaboration Suite (ZCS): 0 in the last 7 days and 1 in the last 90 days, 19 of them critical and 19 exploited in the wild. The most recent, CVE-2026-73570, was published on 21 August 2026.","url":"https://junglewise.ai/threats/technologies/zimbra-collaboration-suite-zcs","json_url":"https://junglewise.ai/threats/technologies/zimbra-collaboration-suite-zcs.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/technologies/zimbra-collaboration-suite-zcs","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","counts":{"high":0,"all_time":19,"critical":19,"exploited":19,"last_7_days":0,"last_30_days":0,"last_90_days":1,"last_365_days":6},"latest":[{"cve":"CVE-2026-73570","cvss":9.8,"epss":0.1174,"slug":"cve-2026-73570-zimbra-collaboration-suite-os-command-injection-in-smtp","title":"Zimbra Collaboration Suite OS command injection in SMTP","severity":"critical","exploited":true,"published_at":"2026-08-21T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2026-73570-zimbra-collaboration-suite-os-command-injection-in-smtp"},{"cve":"CVE-2025-48700","cvss":6.1,"epss":0.1876,"slug":"cve-2025-48700-synacor-zimbra-collaboration-suite-xss-in-classic-ui","title":"Synacor Zimbra Collaboration Suite XSS in Classic UI","severity":"critical","exploited":true,"published_at":"2026-04-20T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2025-48700-synacor-zimbra-collaboration-suite-xss-in-classic-ui"},{"cve":"CVE-2025-66376","cvss":7.2,"epss":0.109,"slug":"cve-2025-66376-synacor-zimbra-collaboration-suite-stored-xss-in-classic-ui","title":"Synacor Zimbra Collaboration Suite stored XSS in Classic UI","severity":"critical","exploited":true,"published_at":"2026-03-18T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2025-66376-synacor-zimbra-collaboration-suite-stored-xss-in-classic-ui"},{"cve":"CVE-2020-7796","cvss":9.8,"epss":0.9269,"slug":"cve-2020-7796-synacor-zimbra-collaboration-suite-ssrf-in-webex-zimlet","title":"Synacor Zimbra Collaboration Suite SSRF in WebEx zimlet","severity":"critical","exploited":true,"published_at":"2026-02-17T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2020-7796-synacor-zimbra-collaboration-suite-ssrf-in-webex-zimlet"},{"cve":"CVE-2025-68645","cvss":8.8,"epss":0.4771,"slug":"cve-2025-68645-synacor-zimbra-collaboration-suite-file-inclusion-in-restfilter","title":"Synacor Zimbra Collaboration Suite file inclusion in RestFilter servlet","severity":"critical","exploited":true,"published_at":"2026-01-22T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2025-68645-synacor-zimbra-collaboration-suite-file-inclusion-in-restfilter"},{"cve":"CVE-2025-27915","cvss":5.4,"epss":0.2605,"slug":"cve-2025-27915-synacor-zimbra-collaboration-suite-xss-in-classic-web-client","title":"Synacor Zimbra Collaboration Suite XSS in Classic Web Client","severity":"critical","exploited":true,"published_at":"2025-10-07T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2025-27915-synacor-zimbra-collaboration-suite-xss-in-classic-web-client"},{"cve":"CVE-2019-9621","cvss":7.5,"epss":0.9411,"slug":"cve-2019-9621-synacor-zimbra-collaboration-suite-ssrf-in-proxyservlet","title":"Synacor Zimbra Collaboration Suite SSRF in ProxyServlet","severity":"critical","exploited":true,"published_at":"2025-07-07T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2019-9621-synacor-zimbra-collaboration-suite-ssrf-in-proxyservlet"},{"cve":"CVE-2024-27443","cvss":6.1,"epss":0.3243,"slug":"cve-2024-27443-synacor-zimbra-collaboration-suite-xss-in-calendarinvite","title":"Synacor Zimbra Collaboration Suite XSS in CalendarInvite","severity":"critical","exploited":true,"published_at":"2025-05-19T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2024-27443-synacor-zimbra-collaboration-suite-xss-in-calendarinvite"},{"cve":"CVE-2023-34192","cvss":9,"slug":"cve-2023-34192-synacor-zimbra-collaboration-suite-zcs-cross-site-scripting-xss","title":"Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability","severity":"critical","exploited":true,"published_at":"2025-02-25T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2023-34192-synacor-zimbra-collaboration-suite-zcs-cross-site-scripting-xss"},{"cve":"CVE-2024-45519","cvss":9.8,"slug":"cve-2024-45519-synacor-zimbra-collaboration-suite-zcs-command-execution","title":"Synacor Zimbra Collaboration Suite (ZCS) Command Execution Vulnerability","severity":"critical","exploited":true,"published_at":"2024-10-03T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2024-45519-synacor-zimbra-collaboration-suite-zcs-command-execution"},{"cve":"CVE-2023-37580","cvss":6.1,"slug":"cve-2023-37580-synacor-zimbra-collaboration-suite-zcs-cross-site-scripting-xss","title":"Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability","severity":"critical","exploited":true,"published_at":"2023-07-27T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2023-37580-synacor-zimbra-collaboration-suite-zcs-cross-site-scripting-xss"},{"cve":"CVE-2022-27926","cvss":6.1,"slug":"cve-2022-27926-synacor-zimbra-collaboration-suite-zcs-cross-site-scripting-xss","title":"Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability","severity":"critical","exploited":true,"published_at":"2023-04-03T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2022-27926-synacor-zimbra-collaboration-suite-zcs-cross-site-scripting-xss"},{"cve":"CVE-2022-41352","cvss":9.8,"slug":"cve-2022-41352-synacor-zimbra-collaboration-suite-zcs-arbitrary-file-upload","title":"Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability","severity":"critical","exploited":true,"published_at":"2022-10-20T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2022-41352-synacor-zimbra-collaboration-suite-zcs-arbitrary-file-upload"},{"cve":"CVE-2022-37042","cvss":9.8,"slug":"cve-2022-37042-synacor-zimbra-collaboration-suite-zcs-authentication-bypass","title":"Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass Vulnerability","severity":"critical","exploited":true,"published_at":"2022-08-11T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2022-37042-synacor-zimbra-collaboration-suite-zcs-authentication-bypass"},{"cve":"CVE-2022-27925","cvss":7.2,"slug":"cve-2022-27925-synacor-zimbra-collaboration-suite-zcs-arbitrary-file-upload","title":"Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability","severity":"critical","exploited":true,"published_at":"2022-08-11T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2022-27925-synacor-zimbra-collaboration-suite-zcs-arbitrary-file-upload"},{"cve":"CVE-2022-27924","cvss":7.5,"slug":"cve-2022-27924-synacor-zimbra-collaboration-suite-zcs-command-injection","title":"Synacor Zimbra Collaboration Suite (ZCS) Command Injection Vulnerability","severity":"critical","exploited":true,"published_at":"2022-08-04T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2022-27924-synacor-zimbra-collaboration-suite-zcs-command-injection"},{"cve":"CVE-2018-6882","cvss":6.1,"slug":"cve-2018-6882-synacor-zimbra-collaboration-suite-zcs-cross-site-scripting-xss","title":"Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability","severity":"critical","exploited":true,"published_at":"2022-04-19T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2018-6882-synacor-zimbra-collaboration-suite-zcs-cross-site-scripting-xss"},{"cve":"CVE-2022-24682","cvss":6.1,"slug":"cve-2022-24682-synacor-zimbra-collaborate-suite-zcs-cross-site-scripting","title":"Synacor Zimbra Collaborate Suite (ZCS) Cross-Site Scripting Vulnerability","severity":"critical","exploited":true,"published_at":"2022-02-25T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2022-24682-synacor-zimbra-collaborate-suite-zcs-cross-site-scripting"},{"cve":"CVE-2019-9670","cvss":9.8,"slug":"cve-2019-9670-synacor-zimbra-collaboration-suite-zcs-improper-restriction-of-xml","title":"Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External Entity Reference","severity":"critical","exploited":true,"published_at":"2022-01-10T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2019-9670-synacor-zimbra-collaboration-suite-zcs-improper-restriction-of-xml"}],"weekly":[{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":1,"exploited":1,"vulnerabilities":1},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-28","critical":0,"exploited":0,"vulnerabilities":0}],"related":[{"name":"Synacor Zimbra Collaboration Suite","slug":"zimbra-collaboration-suite","vulnerabilities":24,"url":"https://junglewise.ai/threats/technologies/zimbra-collaboration-suite"}],"technology":{"hub":true,"name":"Synacor Zimbra Collaboration Suite (ZCS)","slug":"zimbra-collaboration-suite-zcs","vendor":{"name":"Synacor","slug":"synacor","url":"https://junglewise.ai/threats/vendors/synacor"},"aliases":[],"category":"collaboration-software","homepage":"https://www.zimbra.com/","repo_url":"https://github.com/Zimbra/zm-build","description":"Zimbra Collaboration Suite is an enterprise-grade email and collaboration platform that includes contacts, calendar, tasks, and file sharing.","url":"https://junglewise.ai/threats/technologies/zimbra-collaboration-suite-zcs"},"most_severe":[{"cve":"CVE-2020-7796","cvss":9.8,"epss":0.9269,"slug":"cve-2020-7796-synacor-zimbra-collaboration-suite-ssrf-in-webex-zimlet","title":"Synacor Zimbra Collaboration Suite SSRF in WebEx zimlet","severity":"critical","exploited":true,"published_at":"2026-02-17T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2020-7796-synacor-zimbra-collaboration-suite-ssrf-in-webex-zimlet"},{"cve":"CVE-2026-73570","cvss":9.8,"epss":0.1174,"slug":"cve-2026-73570-zimbra-collaboration-suite-os-command-injection-in-smtp","title":"Zimbra Collaboration Suite OS command injection in SMTP","severity":"critical","exploited":true,"published_at":"2026-08-21T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2026-73570-zimbra-collaboration-suite-os-command-injection-in-smtp"},{"cve":"CVE-2024-45519","cvss":9.8,"slug":"cve-2024-45519-synacor-zimbra-collaboration-suite-zcs-command-execution","title":"Synacor Zimbra Collaboration Suite (ZCS) Command Execution Vulnerability","severity":"critical","exploited":true,"published_at":"2024-10-03T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2024-45519-synacor-zimbra-collaboration-suite-zcs-command-execution"},{"cve":"CVE-2022-41352","cvss":9.8,"slug":"cve-2022-41352-synacor-zimbra-collaboration-suite-zcs-arbitrary-file-upload","title":"Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability","severity":"critical","exploited":true,"published_at":"2022-10-20T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2022-41352-synacor-zimbra-collaboration-suite-zcs-arbitrary-file-upload"},{"cve":"CVE-2022-37042","cvss":9.8,"slug":"cve-2022-37042-synacor-zimbra-collaboration-suite-zcs-authentication-bypass","title":"Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass Vulnerability","severity":"critical","exploited":true,"published_at":"2022-08-11T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2022-37042-synacor-zimbra-collaboration-suite-zcs-authentication-bypass"},{"cve":"CVE-2019-9670","cvss":9.8,"slug":"cve-2019-9670-synacor-zimbra-collaboration-suite-zcs-improper-restriction-of-xml","title":"Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External Entity Reference","severity":"critical","exploited":true,"published_at":"2022-01-10T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2019-9670-synacor-zimbra-collaboration-suite-zcs-improper-restriction-of-xml"},{"cve":"CVE-2023-34192","cvss":9,"slug":"cve-2023-34192-synacor-zimbra-collaboration-suite-zcs-cross-site-scripting-xss","title":"Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability","severity":"critical","exploited":true,"published_at":"2025-02-25T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2023-34192-synacor-zimbra-collaboration-suite-zcs-cross-site-scripting-xss"},{"cve":"CVE-2025-68645","cvss":8.8,"epss":0.4771,"slug":"cve-2025-68645-synacor-zimbra-collaboration-suite-file-inclusion-in-restfilter","title":"Synacor Zimbra Collaboration Suite file inclusion in RestFilter servlet","severity":"critical","exploited":true,"published_at":"2026-01-22T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2025-68645-synacor-zimbra-collaboration-suite-file-inclusion-in-restfilter"},{"cve":"CVE-2019-9621","cvss":7.5,"epss":0.9411,"slug":"cve-2019-9621-synacor-zimbra-collaboration-suite-ssrf-in-proxyservlet","title":"Synacor Zimbra Collaboration Suite SSRF in ProxyServlet","severity":"critical","exploited":true,"published_at":"2025-07-07T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2019-9621-synacor-zimbra-collaboration-suite-ssrf-in-proxyservlet"},{"cve":"CVE-2022-27924","cvss":7.5,"slug":"cve-2022-27924-synacor-zimbra-collaboration-suite-zcs-command-injection","title":"Synacor Zimbra Collaboration Suite (ZCS) Command Injection Vulnerability","severity":"critical","exploited":true,"published_at":"2022-08-04T00:00:00+00:00","url":"https://junglewise.ai/threats/cve-2022-27924-synacor-zimbra-collaboration-suite-zcs-command-injection"}],"generated_at":"2026-09-28T03:07:00.154823+00:00"}