CVE-2020-26300Public exploit

Command execution via unsanitized services parameter

Published Sep 9, 2021 · Updated Aug 4, 2024

Command injection in systeminformation before 4.26.2 allows attackers to execute commands through untrusted si.services input. The si.services method inserts its caller-controlled service selector into a shell command after incomplete filtering by sanitizeShellString. Exploitation requires a consuming application to pass attacker-controlled input to the method, and injected commands run with the Node.js process's privileges.

CVSS severity5.9
Medium
EPSS probability1.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in systeminformation before 4.26.2 allows attackers to execute commands through untrusted si.services input. The si.services method inserts its caller-controlled service selector into a shell command after incomplete filtering by sanitizeShellString. Exploitation requires a consuming application to pass attacker-controlled input to the method, and injected commands run with the Node.js process's privileges.

The record

CVE
CVE-2020-26300
Published
Sep 9, 2021
Updated
Aug 4, 2024
Vendor
Sebastian Hildebrandt
Product
systeminformation
Classifications
CWE-77, CWE-78, T1059.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 9, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=< 4.26.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Sebastian Hildebrandt · systeminformationversion=< 4.26.2

Published CVSS scores

5.9GitHub, Inc.CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
9.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:P/I:P/A:P

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

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

Technologies

Your stack

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Your stack

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