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Vendor

Synacor

Zimbra Collaboration Suite Zimbra Collaboration Suite (ZCS)

Tracked CVEs

CVE-2026-73570KEV CVE-2025-66376KEV CVE-2025-48700KEV CVE-2020-7796KEV CVE-2025-68645KEV

Coverage timeline

Exploited Zimbra Flaw Highlights Shrinking Window to Patch
www.darkreading.com · Aug 24, 2026
CISA adds critical Zimbra flaw CVE-2026-73570 to KEV list
securityaffairs.com · Aug 22, 2026
CISA flags critical Zimbra command injection flaw in KEV catalog
www.cisa.gov · Aug 22, 2026
CISA Adds High Zimbra SMTP Flaw CVE‑2026‑73570 to Exploit List
cisa.gov · Aug 21, 2026
CERT Polska warns of Zimbra RCE flaw CVE-2026-73570 after patch
securityaffairs.com · Aug 21, 2026
Zimbra CVE-2026-73570 bug lets attackers run OS commands
www.securityweek.com · Aug 20, 2026
Zimbra flaw (CVE-2026-73570) lets attackers run arbitrary code
securityonline.info · Aug 20, 2026
Zimbra XSS bug CVE‑2025-66376 lets Russian hackers steal mail
socradar.io · Jul 25, 2026
US agencies warn Laundry Bear exploits CVE-2025-66376 in Zimbra
securityaffairs.com · Jul 24, 2026
LAUNDRY BEAR Uses CVE-2025-66376 to Hack Zimbra via Phishing
www.cisa.gov · Jul 23, 2026
Russian zero-click attack exploits Zimbra flaw CVE-2025-66376
www.infosecurity-magazine.com · Jul 23, 2026
Russian hackers exploit Zimbra flaw in zero click email campaign
unit42.paloaltonetworks.com · Jul 23, 2026
CISA Adds Cisco SD WAN, Zimbra XSS Flaws to KEV Catalog
www.securityweek.com · Apr 21, 2026
CISA adds weaponised PaperCut, TeamCity flaws to KEV catalog
securityaffairs.com · Apr 21, 2026
CISA adds eight KEV flaws, Cisco SDWAN bugs actively exploited
thehackernews.com · Apr 21, 2026
Synacor Zimbra XSS Flaw (CVE-2025-48700) Exposes User Sessions
www.cisa.gov · Apr 21, 2026
CISA flags active Synacor Zimbra XSS flaw, urges immediate patch
cisa.gov · Apr 21, 2026
Russian APT targets Ukraine via Zimbra XSS flaw CVE-2025-66376
securityaffairs.com · Mar 19, 2026
Russian hackers exploit Zimbra flaw in Ukrainian govt attacks
databreaches.net · Mar 19, 2026
Russian APT Exploits Zimbra Vulnerability Against Ukraine
www.securityweek.com · Mar 19, 2026
CISA Warns of Zimbra, SharePoint Flaw Exploits; Cisco Zero-Day Hit in Ransomware Attacks
thehackernews.com · Mar 19, 2026
U.S. CISA adds Microsoft SharePoint and Zimbra flaws to its Known Exploited Vulnerabilities catalog
securityaffairs.com · Mar 18, 2026
CISA Adds CVE-2025-66376 to Known Exploited Vulnerabilities Catalogue
www.cisa.gov · Mar 18, 2026
CISA Adds CVE-2025-66376 to Known Exploited Vulnerabilities Catalogue
cisa.gov · Mar 18, 2026
U.S. CISA adds Google Chromium CSS, Microsoft Windows, TeamT5 ThreatSonar Anti-Ransomware, and Zimbra flaws to its Known Exploited Vulnerabilities catalog
securityaffairs.com · Feb 18, 2026
CISA Flags Four Security Flaws Under Active Exploitation in Latest KEV Update
thehackernews.com · Feb 18, 2026
CISA Updates KEV Catalog with Four Actively Exploited Software Vulnerabilities
thehackernews.com · Jan 23, 2026
U.S. CISA adds Prettier eslint-config-prettier, Vite Vitejs, Versa Concerto SD-WAN orchestration platform, and Synacor Zimbra Collaboration Suite flaws to its Known Exploited Vulnerabilities catalog
securityaffairs.com · Jan 23, 2026
Organizations Warned of Exploited Zimbra Collaboration Vulnerability
www.securityweek.com · Jan 23, 2026
CISA Adds 4 Critical Flaws to “Must-Patch” List as Exploits Surge
securityonline.info · Jan 23, 2026