How severe is CVE-2021-21518?

CVE-2021-21518 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-21518 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21518?

CVE-2021-21518 primarily affects Dell Supportassist Client Promanage. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-21518?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-21518 published?

CVE-2021-21518 was published on 2021-03-12 and last updated on 2026-06-17.

CVE-2021-21518

CVE-2021-21518 is a high-severity vulnerability in Dell Supportassist Client Promanage with a CVSS 3.x base score of 7.8. 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-427.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-427
Affected product: Dell Supportassist Client Promanage
Published: 2021-03-12
Last modified: 2026-06-17

Description

Dell SupportAssist Client for Consumer PCs versions 3.7.x, 3.6.x, 3.4.x, 3.3.x, Dell SupportAssist Client for Business PCs versions 2.0.x, 2.1.x, 2.2.x, and Dell SupportAssist Client ProManage 1.x contain a DLL injection vulnerability in the Costura Fody plugin. A local user with low privileges could potentially exploit this vulnerability, leading to the execution of arbitrary executable on the operating system with SYSTEM privileges.

Frequently asked questions

What is CVE-2021-21518?: Dell SupportAssist Client for Consumer PCs versions 3.7.x, 3.6.x, 3.4.x, 3.3.x, Dell SupportAssist Client for Business PCs versions 2.0.x, 2.1.x, 2.2.x, and Dell SupportAssist Client ProManage 1.x contain a DLL injection vulnerability in the Costura Fody plugin. A local user with low privileges could potentially exploit this vulnerability, leading to the execution of arbitrary executable on the operating system with SYSTEM privileges.
How severe is CVE-2021-21518?: CVE-2021-21518 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-21518 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21518?: CVE-2021-21518 primarily affects Dell Supportassist Client Promanage. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-21518?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-21518 published?: CVE-2021-21518 was published on 2021-03-12 and last updated on 2026-06-17.

References

https://www.dell.com/support/kbdoc/en-us/000184012/dsa-2021-052-dell-supportassist-for-home-pcs-business-pcs-security-update-for-pc-doctor-plugin-vulnerability

Affected products (8)

cpe:2.3:a:dell:supportassist_client_promanage:1.0:*:*:*:*:*:*:*
cpe:2.3:a:dell:supportassist_for_business_pcs:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:dell:supportassist_for_business_pcs:2.1.0:*:*:*:*:*:*:*
cpe:2.3:a:dell:supportassist_for_business_pcs:2.2.0:*:*:*:*:*:*:*
cpe:2.3:a:dell:supportassist_for_home_pcs:3.3.3:*:*:*:*:*:*:*
cpe:2.3:a:dell:supportassist_for_home_pcs:3.4.0:*:*:*:*:*:*:*
cpe:2.3:a:dell:supportassist_for_home_pcs:3.6.0:*:*:*:*:*:*:*
cpe:2.3:a:dell:supportassist_for_home_pcs:3.7.0:*:*:*:*:*:*:*

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