by Kastro
Paper/Archive/CVE-2026-28197

CVE-2026-28197

Cohesity NetBackup Flex OS — Privilege Escalation via Argument Injection in NetBackup Flex OS Shell

EPSS 0.7%CVSS 9.4
critical.is priorityof 100
39
CVSS 9.4 (CNA)9.4 / 10 × 3028.2Not in CISA KEV+300.0EPSS percentile 51.9.519 × 2010.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
NetBackup Flex OS< 6.46.4CNA

Scores by source

ENISA (CNA)9.4CVSS: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 (CNA)8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refcvcn.gov.it/cvcn/cve/CVE-2026-28197advisorygithub.com/cohesity/SecAdvisory/blob/master/COH-2026-0001.md