CISA KEV · ENISA EUVD · FIRST EPSS

Exploited vulnerabilities

The vulnerabilities attackers actually use, gathered from public sources and ranked by priority. Updated automatically, every day.

1,783exploited vulnerabilities tracked

8added in 7 days

35added in 30 days

37rising fast

361used by ransomware

665to fix within 24 h

19 vulnerabilities Clear filters Data updated on 03 Nov 2026

CVE	Product	Phase	EPSS	CVSS	Index	Exploited on
CVE-2026-73570	Zimbra Collaboration Suite (ZCS) OS Command Injection VulnerabilitySynacor	Actively exploited	71.7%	8.9	8.1	18 Aug 2026
CVE-2025-48700	Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability	Background exploitation	1.7%	6.1	4.3	20 Apr 2026
CVE-2025-66376	Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting Vulnerability	Background exploitation	20.2%	7.2	5.9	18 Mar 2026
CVE-2020-7796	Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery Vulnerability	Background exploitation	93.6%	9.8	9.1	17 Feb 2026
CVE-2025-68645	Synacor Zimbra Collaboration Suite (ZCS) PHP Remote File Inclusion Vulnerability	Background exploitation	48.9%	8.8	7.4	22 Jan 2026
CVE-2025-27915	Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability	Background exploitation	4.1%	5.4	3.5	07 Oct 2025
CVE-2019-9621	Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery (SSRF) Vulnerability	Background exploitation	81.0%	7.5	7.8	07 Jul 2025
CVE-2024-27443	Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability	Background exploitation	24.6%	6.1	5.6	19 May 2025
CVE-2023-34192	Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability	Background exploitation	77.3%	9.0	7.7	25 Feb 2025
CVE-2024-45519	Synacor Zimbra Collaboration Suite (ZCS) Command Execution Vulnerability	Background exploitation	99.9%	10.0	9.4	03 Oct 2024
CVE-2023-37580	Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability	Background exploitation	49.1%	6.1	6.3	27 Jul 2023
CVE-2022-27926	Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability	Background exploitation	17.6%	6.1	5.4	03 Apr 2023
CVE-2022-41352	Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability	Background exploitation	95.5%	9.8	9.8	20 Oct 2022
CVE-2022-37042	Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass Vulnerability	Background exploitation	92.1%	9.8	9.7	11 Aug 2022
CVE-2022-27925	Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability	Background exploitation	98.7%	7.2	8.2	11 Aug 2022
CVE-2022-27924	Synacor Zimbra Collaboration Suite (ZCS) Command Injection Vulnerability	Background exploitation	93.9%	9.8	9.7	04 Aug 2022
CVE-2018-6882	Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability	Background exploitation	29.8%	6.1	6.3	19 Apr 2022
CVE-2022-24682	Synacor Zimbra Collaborate Suite (ZCS) Cross-Site Scripting Vulnerability	Background exploitation	30.9%	6.1	6.4	25 Feb 2022
CVE-2019-9670	Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External Entity Reference	Background exploitation	99.99%	9.8	9.3	10 Jan 2022

How we rank vulnerabilities

A vulnerability joins this list as soon as CISA adds it to its KEV catalog or ENISA flags it as exploited in the EUVD.

The CheckOps priority index, out of 10, combines severity (CVSS), the probability of exploitation within 30 days (EPSS, FIRST) and public exploitation signals.

Above 8, we recommend patching within 24 hours; above 6, or as soon as a vulnerability is exploited, within 7 days.

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Sources: CISA KEV · ENISA EUVD · FIRST EPSS · OSV. Public data aggregated by CheckOps, updated automatically. Source texts remain the property of their authors.