Get-FortiOSUpdate.ps1

# Example of how to check for latest version

[xml]$rssData = Invoke-WebRequest "http://pub.kb.fortinet.com/rss/firmware.xml"

$MyDevice = "FortiOS"
[Version]$MyDeviceVersion = "1.0.0"
$rssData.rss.channel.item | ForEach-Object {
    [string]$TitleData = $_.title
    $a = $TitleData.Split(' ')
    $Title = $a[0]
    [Version]$Version = $a[1]
    if($MyDevice -match $Title -and $MyDeviceVersion -ne $Version){
        "Update for $($Title.ToString()) v$($MyDeviceVersion) -> $($Version)"
    }
}