You’ll first need to clarify what kind of paper you mean:
Important: Fortinet does not release official images with “exclusive” in the filename. If you see this, it is either an internal build or an unauthorized redistribution. fgtvm64kvmv721fbuild1254fortinetoutkvmqcow2 exclusive
In the context of firmware, "exclusive" often refers to the granular nature of the release. Build 1254 represents a snapshot in time. You’ll first need to clarify what kind of paper you mean:
Fortinet releases builds frequently. If you are troubleshooting a specific bug—say, an IPsec VPN instability or a specific SSL-VPN authentication loop—you often need to pinpoint the exact build where the behavior changes. Important : Fortinet does not release official images
For forensic analysts or malware researchers, having a specific build like 1254 is invaluable. It allows them to test exploit code against that specific binary signature to verify if a vulnerability is present, or to test the efficacy of a security patch without upgrading the entire major version.
Official:
FGT_VM64_KVM-v7.2.1-build1254-FORTINET-out.kvm.qcow2
(Similar to yours but without “exclusive”).