CVE-2026-28198
HIGH
NVD
CVSS Score
8.8
Severity
HIGH
Published
Sep 18, 2026
Vendor
unknown
Description
An authenticated, low-privileged user with access to the NetBackup Flex OS management shell could bypass the cryptographic signature verification step of a privileged support command by supplying a specially formed access credential. Successful exploitation grants the attacker an unrestricted root shell with full control over the Flex appliance host and all hosted containers, completely compromising confidentiality, integrity, and availability.