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TI-2026-22538 Aliases CVE-2026-28199GHSA-chmq-8gh3-838c

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

Priority LOW 21CWE-347Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-347.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00099 0th percentileScored 2026-11-07
Fix Fixed NetBackup Flex OS (Cohesity): 6.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CohesityNetBackup Flex OSbefore 6.46.4Patch availableCNA
  • NetBackup Flex OS VendorCohesity Affected before 6.4 Fixed in 6.4 Patch available CNA

Remediation

  • Fix · CNA NetBackup Flex OS (Cohesity) Fixed in 6.4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Cohesity NetBackup Flex OS — github.com/cohesity/SecAdvisory/blob/master/COH-2026-0001.md

    3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-22536 Privilege Escalation via Argument Injection in NetBackup Flex OS ShellPriority MEDIUM 44
    • TI-2026-22537 Privilege Escalation via Cryptographic Signature Verification Bypass in NetBackup Flex OS ShellPriority MEDIUM 42
    Show all 3 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-28199
  2. 2026-10-03 Alias added: GHSA-chmq-8gh3-838c

References

Advisory 1

Other 1

  • TI-2021-09357 Undocumented Default Cryptographic Key Vulnerability in Cohesity DataPlatform version 6.3… CVSS 3.1CRITICAL 9.8
  • TI-2026-22536 Privilege Escalation via Argument Injection in NetBackup Flex OS Shell CVSS 4.0CRITICAL 9.4
  • TI-2026-22537 Privilege Escalation via Cryptographic Signature Verification Bypass in NetBackup Flex OS Shell CVSS 4.0CRITICAL 9.4
  • TI-2025-41479 Multiple authenticated OS command injection vulnerabilities exist in the Cohesity… CVSS 3.1HIGH 7.2
  • TI-2025-39485 Cohesity TranZman Migration Appliance Release 4.0 Build 14614 was discovered to contain… CVSS 3.1HIGH 7.2
  • TI-2025-39483 Incorrect access control in the component /opt/SRLtzm/bin/TapeDumper of Cohesity TranZman… CVSS 3.1HIGH 7.8
See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences