Almost never: which may causes issues likes thoses! : From Wikipedia & OpenBSD: The affected versions of OpenSSL are OpenSSL 1.0.1 through 1.0.1f (inclusive).

Almost never: which may causes issues likes thoses! : From Wikipedia & OpenBSD: The affected versions of OpenSSL are OpenSSL 1.0.1 through 1.0.1f (inclusive). Later versions (1.0.1g and ulterior ) and previous versions (1.0.0 branch and older) are not vulnerable. Installations of the affected versions are vulnerable unless OpenSSL was compiled with -DOPENSSL_NO_HEARTBEATS. same applies for : http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-19990414-ios-nat-acl http://tools.cisco.com/security/center/content/CiscoSecurity... same applies for : https://blog.mozilla.org/security/2010/03/18/update-on-secunia-advisory-sa38608/ https://blog.mozilla.org/security/2010/03/18/update-on-secun... same applies for : http://www.debian.org/security/2000/20001013 http://www.debian.org/security/2000/20001013 same applies for : https://kb.isc.org/article/AA-01015/0 https://kb.isc.org/article/AA-01015/0 sticking to early versions (lazingly will save you)