[CISA-2026:0318] CISA Adds One Known Exploited Vulnerability to Catalog (https://secdb.nttzen.cloud/security-advisory/detail/CISA-2026:0318)CISA has added one new vulnerability to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. These types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risk to the federal enterprise.️ CVE-2025-66376 (https://secdb.nttzen.cloud/cve/detail/CVE-2025-66376)- Name: Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting Vulnerability- Action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.- Known To Be Used in Ransomware Campaigns? Unknown- Vendor: Synacor- Product: Zimbra Collaboration Suite (ZCS)- Notes: https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories ; https://nvd.nist.gov/vuln/detail/CVE-2025-66376#SecDB #InfoSec #CVE #CISA_KEV #cisa_20260318 #cisa20260318 #cve_2025_66376 #cve202566376
