CVE-2021-21570Network attack vector

Authenticated disclosure of unauthorized client information

Published Sep 28, 2021 · Updated Sep 17, 2024

Information disclosure in Dell Technologies NetWorker 18.x and 19.x allows remote authenticated users to access unauthorized client information. Dell has not published the affected code locus or the operation that improperly returns the information. Exploitation requires a NetWorker server account with remote access to clients, and the disclosure is limited to information outside that account's authorization.

CVSS severity6.8
Medium
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Dell Technologies NetWorker 18.x and 19.x allows remote authenticated users to access unauthorized client information. Dell has not published the affected code locus or the operation that improperly returns the information. Exploitation requires a NetWorker server account with remote access to clients, and the disclosure is limited to information outside that account's authorization.

The record

CVE
CVE-2021-21570
Published
Sep 28, 2021
Updated
Sep 17, 2024
Vendor
Dell Technologies
Product
NetWorker
Classifications
CWE-78
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 28, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record 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=18.x, 19.x

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Dell Technologies · NetWorkerversion=18.x, 19.x

Published CVSS scores

4.0NISTAV:N/AC:L/Au:S/C:P/I:N/A:N
4.9NISTCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
6.8DellCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/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-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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