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Canon Marketing Japan Inc. Guardianwall Mail Security Cloud (saas Version) vulnerabilities

canon marketing japan inc. guardianwall mail security cloud (saas version), guardianwall mailsuite (on-premises version) +1 moreStack-based buffer overflow vulnerability exists in GUARDIANWALL MailSuite and GUARDIANWALL Mail...CVE-2026-326619.3 CriticalMay 13, 2026