Cisco has released security update to address high severity vulnerabilities (CVE-2021-34775, CVE-2021-34776, CVE-2021-34777, CVE-2021-34778, CVE-2021-3478 CVE-2021-34779, CVE-2021-34780) in Cisco Small Business 220 Series Smart Switches. An attacker could exploit some of these vulnerabilities to trigger denial of service condition on the targeted system.

More information on vulnerabilities and update is available in Cisco security advisory – cisco.com.