Synology NAS owners should take the network storage devices offline and manually update them as soon as possible, especially for older units.
Synology DS420+
Synology DS420+
The discovery of vulnerabilities in PHP led to large sections of the Internet updating servers to patch the software flaws. This doesn’t just affect commercial webservers, as it is also a problem for home NAS units, including those with services that are accessible over the Internet.
The PHP fiasco should’ve been a warning for everyone to start updating their devices more regularly. Not just to protect against the PHP vulnerabilities, but other existing and older security threats too.