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CVE PROGRAM SOURCE RECORD9.4 Critical

CVE-2026-28198

Privilege Escalation via Cryptographic Signature Verification Bypass in NetBackup Flex OS Shell

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Cohesity NetBackup Flex OS

Default version status: unaffected

  • 0 to < 6.4affected

References