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PowerScale OneFS EUVDEUVD-2026-75103

| CVE-2026-40635 MEDIUM
Insecure Temporary File (CWE-377)
2026-09-09 dell GHSA-mw53-2gx3-5w75
Denial Of Service Dell Powerscale Onefs
5.4
CVSS 3.1 · Vendor: dell
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Severity by source

Vendor (dell) PRIMARY
5.4 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
vuln.today AI
5.4 MEDIUM

Network-reachable with low credentials required; no confidentiality loss confirmed; integrity and availability partially impacted per description.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (dell).

CVSS VectorVendor: dell

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low

Lifecycle Timeline

2
Analysis Generated
Sep 09, 2026 - 17:23 vuln.today
Patch available
Sep 09, 2026 - 17:04 EUVD

DescriptionCVE.org

Dell PowerScale OneFS versions 9.12.0.0 through 9.13.1.0 contain an Insecure Temporary File vulnerability. A low privileged remote attacker could potentially exploit this vulnerability, leading to denial of service and information tampering.

AnalysisAI

Dell PowerScale OneFS versions 9.12.0.0 through 9.13.1.0 expose a CWE-377 insecure temporary file flaw that a low-privileged remote attacker can exploit to cause denial of service and tamper with data. The vulnerability stems from unsafe temporary file handling - likely predictable naming or insecure permissions - enabling race-condition or symlink attacks against the storage platform. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Vulnerability AssessmentAI

Exploitation Exploitation requires a low-privileged authenticated account on the Dell PowerScale OneFS cluster - PR:L in the CVSS confirms this. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 score of 5.4 (Medium) reflects a constrained threat: AV:N means the attacker reaches the vulnerability over the network, but PR:L requires existing low-privileged credentials, limiting the attack surface to authenticated users or compromised accounts. … 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 Upgrade Dell PowerScale OneFS to version 9.13.1.1 or later (9.13.x branch) or to version 9.15.0.0 or later (newer branch) per Dell advisory DSA-2026-360 at https://www.dell.com/support/kbdoc/en-us/000505684/dsa-2026-360-security-update-for-dell-powerscale-onefs-multiple-vulnerabilities. … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-75103 vulnerability details – vuln.today
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