How severe is CVE-2021-21529?

CVE-2021-21529 has a CVSS 3.x base score of 3.8, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2021-21529 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21529?

CVE-2021-21529 affects Dell System Update. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21529?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-21529 published?

CVE-2021-21529 was published on 2021-04-02 and last updated on 2026-06-17.

CVE-2021-21529

CVE-2021-21529 is a low-severity vulnerability in Dell System Update with a CVSS 3.x base score of 3.8. 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-400.

Key facts

Severity: Low (CVSS 3.x base score 3.8)
CVSS v2: 4.9
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Dell System Update
Published: 2021-04-02
Last modified: 2026-06-17

Description

Dell System Update (DSU) 1.9 and earlier versions contain a denial of service vulnerability. A local authenticated malicious user with low privileges may potentially exploit this vulnerability to cause the system to run out of memory by running multiple instances of the vulnerable application.

Frequently asked questions

What is CVE-2021-21529?: Dell System Update (DSU) 1.9 and earlier versions contain a denial of service vulnerability. A local authenticated malicious user with low privileges may potentially exploit this vulnerability to cause the system to run out of memory by running multiple instances of the vulnerable application.
How severe is CVE-2021-21529?: CVE-2021-21529 has a CVSS 3.x base score of 3.8, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2021-21529 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21529?: CVE-2021-21529 affects Dell System Update. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21529?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21529 published?: CVE-2021-21529 was published on 2021-04-02 and last updated on 2026-06-17.

References

https://www.dell.com/support/kbdoc/en-us/000184608/dsa-2021-059-dell-emc-system-update-dsu-security-update-for-denial-of-service-vulnerability

Affected products (1)

cpe:2.3:a:dell:system_update:*:*:*:*:*:*:*:*

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