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VULNERABILITIES

CVE-2026-28198 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

An authenticated, low-privileged user with access to the NetBackup Flex OS management shell could bypass the cryptographic signature verification step of a privileged support command by supplying a specially formed access credential. Successful exploitation grants the attacker an unrestricted root shell with full control over the Flex appliance host and all hosted containers, completely compromising confidentiality, integrity, and availability.

Metrics

CVSS 3.x Severity and Vector Strings:

NDDVolerionCVSS-B:8.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CNA: ENISACVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/cohesity/SecAdvisory/blob/master/COH-2026-0001.md ENISAAdvisoryBundleRemedyVendor
https://www.cvcn.gov.it/cvcn/cve/CVE-2026-28198 ENISAAdvisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-347Improper Verification of Cryptographic SignatureENISA

Affected Products

ProductVersions
Cohesity NetBackup Flex OS
< 6.4

CPE

  • No CPEs found in CPE dictionary for this product.

Remediation

  • Upgrade: 6.4moderate effort
  • Mitigation:low effort

    Restrict management shell access to authorized administrators only.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-28198
NVD Published Date:
Sep 18, 2026
NVD Last Modified:
Sep 18, 2026
Source:
ENISA
CVE-2026-28198 Details - Not Deferred