CVE-2026-28198
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk10th percentile - higher than 10% of all known CVEs
Summary
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.
Risk Assessment
An attacker can gain full control over the NetBackup Flex appliance, compromising the confidentiality, integrity, and availability of all data and services.
Recommendation
Update NetBackup Flex software to the latest version that fixes this vulnerability, and restrict access to the management shell.
Other vulnerabilities in NetBackup Flex
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS