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CVE-2026-28199— Sensitive File Disclosure via Relative Path Traversal in NetBackup Flex OS Shell

Quick assessment

Affected
Cohesity NetBackup Flex OS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

拥有 NetBackup Flex OS 管理 Shell 访问权限的已认证用户，可以通过向诊断命令提供一个精心构造的路径参数，从而读取底层操作系统中的任意文件。成功利用该漏洞可能会暴露设备上存储的敏感系统配置和凭据信息。

CVSS 3.3 · Low EPSS 0.07% · P0

Affected Version Matrix 1

VendorProduct Version RangeStatus
Cohesity NetBackup Flex OS < 6.4 affected
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I. Basic Information for CVE-2026-28199

Vulnerability Information
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Vulnerability Title
Sensitive File Disclosure via Relative Path Traversal in NetBackup Flex OS Shell
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cohesity NetBackup Flex OS 0 ~ 6.4 -

II. Public POCs for CVE-2026-28199

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III. Intelligence Information for CVE-2026-28199

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Vendor Advisories for CVE-2026-28199 (1)

Other References for CVE-2026-28199 (1)

Same Patch Batch · Cohesity · 2026-09-18 · 3 CVEs total

CVE-2026-28198 8.8 HIGH Privilege Escalation via Cryptographic Signature Verification Bypass in NetBackup Flex OS
CVE-2026-28197 8.8 HIGH Privilege Escalation via Argument Injection in NetBackup Flex OS Shell

IV. Related Vulnerabilities

Same product: NetBackup Flex OS
Same vendor: Cohesity
Same weakness: CWE-347

V. Comments for CVE-2026-28199

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