CVE-2020-5355Network attack vector

Unauthorized network reachability via SSH forwarding

Published Oct 21, 2022 · Updated May 7, 2025

Incorrect default permissions in Dell Isilon OneFS 8.2.2 and earlier allow remote authenticated users to forward traffic through SSH. The SSHD configuration leaves TCP and UNIX-domain stream forwarding enabled for restricted shells, including the default remotesupport account. A holder of such an account can use the cluster as a forwarding point to reach network services beyond the access intended for that restricted shell.

CVSS severity4.3
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect default permissions in Dell Isilon OneFS 8.2.2 and earlier allow remote authenticated users to forward traffic through SSH. The SSHD configuration leaves TCP and UNIX-domain stream forwarding enabled for restricted shells, including the default remotesupport account. A holder of such an account can use the cluster as a forwarding point to reach network services beyond the access intended for that restricted shell.

The record

CVE
CVE-2020-5355
Published
Oct 21, 2022
Updated
May 7, 2025
Vendor
Dell Technologies
Product
PowerScale OneFS
Classifications
CWE-276, T1090
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2022CVE publishedPublication date reported by the CVE source.
  2. May 7, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <8.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Dell Technologies · PowerScale OneFSversion=unspecified <8.2.2

Published CVSS scores

4.3DellCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.3NISTCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-276Incorrect Default Permissions
T1090Proxy

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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