How severe is CVE-2020-5318?

CVE-2020-5318 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-5318 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5318?

CVE-2020-5318 primarily affects Dell Emc Isilon Onefs. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-5318?

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-2020-5318 published?

CVE-2020-5318 was published on 2020-02-06 and last updated on 2026-06-17.

CVE-2020-5318

CVE-2020-5318 is a high-severity vulnerability in Dell Emc Isilon Onefs with a CVSS 3.x base score of 7.5. 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-863.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Dell Emc Isilon Onefs
Published: 2020-02-06
Last modified: 2026-06-17

Description

Dell EMC Isilon OneFS versions 8.1.2, 8.1.0.4, 8.1.0.3, and 8.0.0.7 contain a vulnerability in some configurations. An attacker may exploit this vulnerability to gain access to restricted files. The non-RAN HTTP and WebDAV file-serving components have a vulnerability wherein when either are enabled, and Basic Authentication is enabled for either or both components, files are accessible without authentication.

Frequently asked questions

What is CVE-2020-5318?: Dell EMC Isilon OneFS versions 8.1.2, 8.1.0.4, 8.1.0.3, and 8.0.0.7 contain a vulnerability in some configurations. An attacker may exploit this vulnerability to gain access to restricted files. The non-RAN HTTP and WebDAV file-serving components have a vulnerability wherein when either are enabled, and Basic Authentication is enabled for either or both components, files are accessible without authentication.
How severe is CVE-2020-5318?: CVE-2020-5318 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-5318 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5318?: CVE-2020-5318 primarily affects Dell Emc Isilon Onefs. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-5318?: 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-2020-5318 published?: CVE-2020-5318 was published on 2020-02-06 and last updated on 2026-06-17.

References

https://www.dell.com/support/security/en-us/details/540708/DSA-2020-018-Dell-EMC-Isilon-OneFS-Security-Update-for-Improper-Authorization-Vulnerability

Affected products (4)

cpe:2.3:a:dell:emc_isilon_onefs:8.0.0.7:*:*:*:*:*:*:*
cpe:2.3:a:dell:emc_isilon_onefs:8.1.0.3:*:*:*:*:*:*:*
cpe:2.3:a:dell:emc_isilon_onefs:8.1.0.4:*:*:*:*:*:*:*
cpe:2.3:a:dell:emc_isilon_onefs:8.1.2:*:*:*:*:*:*:*

More vulnerabilities in Dell Emc Isilon Onefs

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CVE-2018-1213 — High (CVSS 8.8): Dell EMC Isilon OneFS versions between 8.1.0.0 - 8.1.0.1, 8.0.1.0 - 8.0.1.2, and 8.0.0.0 - 8.0.0.6, versions 7.2.1.x,…
CVE-2020-5371 — High (CVSS 8.0): Dell EMC Isilon OneFS versions 8.2.2 and earlier and Dell EMC PowerScale version 9.0.0 contain a file permissions…
CVE-2020-26181 — High (CVSS 7.0): Dell EMC Isilon OneFS versions 8.1 and later and Dell EMC PowerScale OneFS version 9.0.0 contain a privilege escalation…

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