The Dell Isilon OneFS versions 8.2.2 and earlier and Dell EMC PowerScale OneFS version 9.0.0 default configuration for Network File System…

published 2021-07-29 5y ago modified 2026-06-17 4mo ago also EUVD-2020-26535

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 62%
public exploits: 0; none known

The Dell Isilon OneFS versions 8.2.2 and earlier and Dell EMC PowerScale OneFS version 9.0.0 default configuration for Network File System (NFS) allows access to an 'admin' home directory. An attacker may leverage a spoofed Unique Identifier (UID) over NFS to rewrite sensitive files to gain administrative access to the system.

Patch / fix

links 1

support.emc.com/kb/542721 advisory

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Exploit prediction

0.99% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	9.0	AV:N/AC:L/Au:S/C:C/I:C/A:C

Affected products

Dell Isilon OneFS

Classification

Weakness

CWE-276 Incorrect Default Permissions

References

support.emc.com /kb/542721
patch, vendor-advisory

Sources

CVE List CVE-2020-5353
NVD CVE-2020-5353

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