You would like to know if Symantec Protection Engine (SPE) is impacted by CVE-2021-3449.
SPE 9.2.1 and newer
CVE-2021-3449 affects OpenSSL versions 1.1.1 through 1.1.1j. SPE 9.2.1 utilizes OpenSSL 1.1.1t and is therefore not impacted by this CVE.