How severe is CVE-2020-5353?

CVE-2020-5353 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-5353 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5353?

CVE-2020-5353 primarily affects Dell Emc Isilon Onefs. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-5353?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-5353 published?

CVE-2020-5353 was published on 2021-07-29 and last updated on 2026-06-17.

CVE-2020-5353

CVE-2020-5353 is a high-severity vulnerability in Dell Emc Isilon Onefs with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-276.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-276
Affected product: Dell Emc Isilon Onefs
Published: 2021-07-29
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2020-5353?: 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.
How severe is CVE-2020-5353?: CVE-2020-5353 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-5353 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5353?: CVE-2020-5353 primarily affects Dell Emc Isilon Onefs. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-5353?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-5353 published?: CVE-2020-5353 was published on 2021-07-29 and last updated on 2026-06-17.

References

https://support.emc.com/kb/542721

Affected products (2)

cpe:2.3:a:dell:emc_isilon_onefs:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:emc_powerscale_onefs:9.0.0:*:*:*:*:*:*:*

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