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CVE-2026-28198

8.8 HIGHpublic exploit available

Published 2026-09-18 · Updated 2026-09-18

AI risk analysis

Summary
The flaw allows a low-privileged user to bypass cryptographic signature verification, gaining unrestricted root access. This is a severe risk as it can fully compromise the system.
Exploitability
Exploitation requires access to the NetBackup Flex OS management shell and knowledge of a specially formed access credential. It is moderately hard to exploit.
Blast radius
If exploited, the attacker gains full control over the Flex appliance host and hosted containers, compromising confidentiality, integrity, and availability.
Detection
No reliable host or network indicator is derivable from the published description.
Prioritized remediation
Disable the affected feature or restrict access to the NetBackup Flex OS management shell.
rceauth-bypassos-shellnetbackup

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-347

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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