CVE-2021-21315Known exploitationPublic exploit

Command execution via array parameters bypassing sanitation

Published Feb 16, 2021 · Updated Oct 21, 2025

OS command injection in Sebastian Hildebrandt systeminformation before 5.3.1 allows local users to execute commands through array parameters. The services and processLoad paths treat array-valued arguments as command text after string-only sanitation, allowing shell metacharacters to reach OS command construction. Reachability requires a host application to pass attacker-controlled arrays into an affected API; commands run with the Node.js process privileges.

CVSS severity7.1
High
EPSS probability90.67%
Next 30 days · Nov 1, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Sebastian Hildebrandt systeminformation before 5.3.1 allows local users to execute commands through array parameters. The services and processLoad paths treat array-valued arguments as command text after string-only sanitation, allowing shell metacharacters to reach OS command construction. Reachability requires a host application to pass attacker-controlled arrays into an affected API; commands run with the Node.js process privileges.

The record

CVE
CVE-2021-21315
Published
Feb 16, 2021
Updated
Oct 21, 2025
Vendor
Sebastian Hildebrandt
Product
systeminformation
Classifications
CWE-78, T1059
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 16, 2021CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 5.3.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Sebastian Hildebrandt · systeminformationversion=< 5.3.1

Published CVSS scores

7.1GitHub CNACVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsShadowserver observations through Sep 28, 2026. Gaps indicate unavailable data.
Sep 22, 2026Sep 28, 2026
View daily counts
Reporting dayUnique IPs
Sep 22, 2026Unavailable
Sep 23, 2026Unavailable
Sep 24, 2026Unavailable
Sep 25, 2026Unavailable
Sep 26, 20261
Sep 27, 20261
Sep 28, 20261
Latest reporting daySep 28, 2026
Latest daily unique IPs1
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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