Command injection in systeminformation - CVE-2021-21388
Published: April 2, 2021 / Updated: May 11, 2026
Vulnerability identifier: #VU130991
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2021-21388
CWE-ID: CWE-77
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Sebastian Hildebrandt
Affected software:
systeminformation
systeminformation
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary commands.
The vulnerability exists due to command injection in the systeminformation package functions si.inetLatency(), si.inetChecksite(), si.services(), and si.processLoad() when processing user-supplied service parameters. A remote attacker can pass specially crafted input to execute arbitrary commands.
How to mitigate CVE-2021-21388
Install security update from vendor's website.