CVE-2021-21600Network attack vector

Authenticated management interruption via API resource exhaustion

Published Aug 10, 2021 · Updated Sep 16, 2024

Uncontrolled resource consumption in Dell Technologies NetWorker before 19.4.0.4 allows remote authenticated users to interrupt management. Dell has not disclosed which API request retains resources past their effective lifetime or which resource is exhausted. The web and desktop interfaces expose the API path to authorized users, and exploitation causes denial of service only in the manageability path.

CVSS severity6.5
Medium
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Dell Technologies NetWorker before 19.4.0.4 allows remote authenticated users to interrupt management. Dell has not disclosed which API request retains resources past their effective lifetime or which resource is exhausted. The web and desktop interfaces expose the API path to authorized users, and exploitation causes denial of service only in the manageability path.

The record

CVE
CVE-2021-21600
Published
Aug 10, 2021
Updated
Sep 16, 2024
Vendor
Dell Technologies
Product
NetWorker
Classifications
CWE-772, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=unspecified <19.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Dell Technologies · NetWorkerversion=unspecified <19.5

Published CVSS scores

4.0NIST NVDAV:N/AC:L/Au:S/C:N/I:N/A:P
6.5Dell TechnologiesCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

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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-772Missing Release of Resource after Effective Lifetime
T1499Endpoint Denial of Service

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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