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CVE-2021-21518

HIGH
7.8
CVSS Score
Published: March 12, 2021 at 08:10 PM UTC
Updated: June 17, 2026 at 03:35 AM UTC
4 products affected across 1 vendorSupportAssist for Home PCsSupportAssist for Business PCsSupportassist Client Promanage

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Severity
HIGH7.8
Exploit prediction
EPSS 0.4%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Supportassist Client Promanage· Dell
95%
1.0
SupportAssist for Business PCs· Dell
95%
2.0.02.1.02.2.0
SupportAssist for Home PCs· Dell
95%
3.3.33.4.03.6.03.7.0
SupportAssist· Dell
60%
v < SACH 3.8, SACB 2.3
Affected range stops below SACH 3.8, SACB 2.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCVendor Advisory
Source: [email protected]
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

CVSS

7.8HIGHdell
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-427

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