CVE-2026-28199

LOW 3.3

Sensitive File Disclosure via Relative Path Traversal in NetBackup Flex OS Shell

CVSS Score

3.3

EPSS Score

0.0%

EPSS Percentile

0th

An authenticated user with access to the NetBackup Flex OS management shell could read arbitrary files from the underlying operating system by supplying a specially crafted path argument to a diagnostic command. Successful exploitation could expose sensitive system configuration and credential material stored on the appliance.

CWE	CWE-347
Vendor	cohesity
Product	netbackup flex os
Published	Sep 18, 2026

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CVSS v3 Breakdown

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

Cohesity / NetBackup Flex OS

0 < 6.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

cvcn.gov.it: https://www.cvcn.gov.it/cvcn/cve/CVE-2026-28199 github.com: https://github.com/cohesity/SecAdvisory/blob/master/COH-2026-0001.md

Credits

🔍 Francesco Caserta (ACN)