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CVE-2020-5355· NVD / CVE Program· CNA dell

The Dell Isilon OneFS versions 8.2.2 and earlier SSHD process improperly allows Transmission Control Protocol (TCP) and stream forwarding.

The Dell Isilon OneFS versions 8.2.2 and earlier SSHD process improperly allows Transmission Control Protocol (TCP) and stream forwarding. This provides the remotesupport user and users with restricted shells more access than is intended.

MediumCVSS 4.3 · v3.1—No exploit No fix recorded
Published
Oct 21, 2022
Updated
Jun 16, 2026
EPSS
0.4% · 34th percentile
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Action score

17

Monitor

Low priority for now.

CVSS
17 / 40 · 4.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
4.3
CNA · dell
4.3
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
dellemc isilon onefs

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • dell emc isilon onefsup to 8.2.2 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (dell). Independent of NVD's CPE analysis and usually ahead of it.

  • Dell Isilon OneFS

    • unspecified and later · before 8.2.2affected

Same product

dell: all records

Other highest-scoring records for the same primary product.

  • CVE-2020-5328Dell EMC Isilon OneFS versions prior to 8.2.0 contain an unauthorized access vulnerability due to a lack of thorough authorization checks wh
    39Monitor
  • CVE-2018-1213Dell 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, and version 7.1.1.11 a
    36Monitor
  • CVE-2020-5353The Dell Isilon OneFS versions 8.2.2 and earlier and Dell EMC PowerScale OneFS version 9.0.0 default configuration for Network File System (
    35Monitor
  • CVE-2020-26180Dell EMC Isilon OneFS supported versions 8.1 and later and Dell EMC PowerScale OneFS supported version 9.0.0 contain an access issue with th
    35Monitor
  • CVE-2020-5369Dell EMC Isilon OneFS versions 8.2.2 and earlier and Dell EMC PowerScale OneFS version 9.0.0 contain a privilege escalation vulnerability.
    35Monitor
  • CVE-2020-5371Dell EMC Isilon OneFS versions 8.2.2 and earlier and Dell EMC PowerScale version 9.0.0 contain a file permissions vulnerability.
    35Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-276 · Incorrect Default Permissions

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records