CVE-2021-21529 Denial of service in DellEMC System Update - DSU

What is CVE-2021-21529?

CVE-2021-21529 is a low-severity denial of service vulnerability in DellEMC System Update - DSU, published on 2 Apr 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-400

Which versions are affected by CVE-2021-21529?

It affects 1 product.

Products include Dell System Update.

How do I fix CVE-2021-21529?

No fix has been published for CVE-2021-21529 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-21529 being exploited?

There is no known exploitation of CVE-2021-21529 in the wild and no public exploit code.

Other vulnerabilities in DellEMC System Update - DSU

• CVE-2026-86360 Path traversal in System Update Critical 9.6
• CVE-2026-86361 Privilege escalation in System Update High 8.2
• CVE-2026-86362 Privilege escalation in System Update High 8.2
• CVE-2026-63697 Security feature bypass in System Update High 7.6
• CVE-2026-71168 Path traversal in System Update High 7.3

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-7r6v-76r3-fwjp.