CVE-2026-28197

Privilege Escalation via Argument Injection in NetBackup Flex OS Shell

Published Sep 18, 2026 CVSS 4.0 · 9.4 Critical EPSS < 1% KEV · Not listed
Description
An authenticated, low-privileged user with access to the NetBackup Flex
OS management shell could supply a specially crafted input to a
privileged administrative command, causing it to execute arbitrary code
with root-level permissions. Successful exploitation grants the attacker
unrestricted control over the Flex appliance host and all hosted
containers, fully compromising confidentiality, integrity, and
availability.

Remediation

Vendor Workaround

Restrict management shell access to authorized administrators only. No compensating control fully eliminates the risk; upgrading is required.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Cohesity
Cohesity netbackup Flex Os
Vendors & Products Cohesity
Cohesity netbackup Flex Os
Type Values Removed Values Added
Description An authenticated, low-privileged user with access to the NetBackup Flex OS management shell could supply a specially crafted input to a privileged administrative command, causing it to execute arbitrary code with root-level permissions. Successful exploitation grants the attacker unrestricted control over the Flex appliance host and all hosted containers, fully compromising confidentiality, integrity, and availability.
Title Privilege Escalation via Argument Injection in NetBackup Flex OS Shell
Weaknesses CWE-88
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.4, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
ENISA
Published
Updated
Sep 18, 2026, 2:31 PM
Reserved
Feb 25, 2026, 2:02 PM
Status
Deferred
Published
Sep 18, 2026, 12:17 PM
Modified
Sep 18, 2026, 7:24 PM