EUVD-2026-82874
GHSA-3x2v-v38v-4mgx
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Authenticated low-priv shell user (PR:L) network-reachable (AV:N) escalates beyond the shell's authority to root over host and containers, so scope changes (S:C) with full C/I/A impact.
Primary rating from Vendor (ENISA).
CVSS VectorVendor: ENISA
Lifecycle Timeline
4DescriptionCVE.org
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.
AnalysisAI
Authenticated, low-privileged users with access to the Cohesity NetBackup Flex OS management shell can inject crafted argument input into a privileged administrative command and achieve arbitrary code execution as root, gaining unrestricted control of the Flex appliance host and every container it runs. The issue is network-reachable with low attack complexity and requires no user interaction, so the only real prerequisite is a valid low-privileged shell account; scoring 9.4 under CVSS 4.0 (assessed 9.1 under CVSS 3.1), it rates as a genuine high-priority vulnerability. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated account with access to the NetBackup Flex OS management shell, even at low privilege (PR:L) - this is the primary limiting factor and rules out pre-authentication remote exploitation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine high-priority vulnerability. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Patch available per vendor advisory: apply the fix described in Cohesity security advisory COH-2026-0001 (https://github.com/cohesity/SecAdvisory/blob/master/COH-2026-0001.md); an exact fixed build number is not specified in the available data, so confirm the target release with the vendor before closing the finding. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory every Cohesity NetBackup Flex appliance in the environment and immediately reduce the population of low-privileged management-shell accounts to the minimum operational set, disabling or deleting stale, shared, and vendor-default accounts, and confirm that shell logins are restricted to hardened administrative jump hosts with multi-factor authentication rather than reachable from general user or internal networks. …
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External POC / Exploit Code
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