CVE-2026-28197
Privilege Escalation via Argument Injection in NetBackup Flex OS Shell
- State
- Published
- Severity
- 9.4 Critical
- Published
- Sep 18, 2026
- Updated
- Sep 18, 2026
- Reserved
- Feb 25, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.4 Critical | 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 | ENISA |
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | ENISA |
Weaknesses
- CWE-88 Improper neutralization of argument delimiters in a command ('argument injection')
Affected Products
| Product | Versions |
|---|---|
NetBackup Flex OSCohesity |
|
References
- https://www.cvcn.gov.it/cvcn/cve/CVE-2026-28197government-resource
- https://github.com/cohesity/SecAdvisory/blob/master/COH-2026-0001.mdvendor-advisory
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