---
id: CVE-2026-28197
title: |-
  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 permission…
summary: |-
  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 permission…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-88
vendor: Cohesity
product: NetBackup Flex OS
affected:
  - netbackup_flex_os < 6.4
published: '2026-09-18'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T19:24:36.593'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-28197'
references:
  - url: 'https://github.com/cohesity/SecAdvisory/blob/master/COH-2026-0001.md'
    label: a6d3dc9e-0591-4a13-bce7-0f5b31ff6158
  - url: 'https://www.cvcn.gov.it/cvcn/cve/CVE-2026-28197'
    label: a6d3dc9e-0591-4a13-bce7-0f5b31ff6158
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-18T14:14:31.135668Z'
ingestedAt: '2026-09-18T11:40:03.686Z'
epss: 0.00666
epssPercentile: 0.4965
---

## Overview

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

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.