CVE-2021-21388

highpriority · track · 40EPSS 0.019 · 79 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.85% (79th) EPSS

CVSS 7.5 · high

Is it mine?

5 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

systeminformation is an open source system and OS information library for node.js. A command injection vulnerability has been discovered in versions of systeminformation prior to 5.6.4. The issue has been fixed with a parameter check on user input. Please upgrade to version >= 5.6.4. If you cannot upgrade, be sure to check or sanitize service parameters that are passed to si.inetLatency(), si.inetChecksite(), si.services(), si.processLoad() and other commands. Only allow strings, reject any arrays. String sanitation works as expected.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.9highCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:Hsecondary · ENISA EU

v3.18.9highCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:Hsecondary · security-advisories@github.comexploitability 2.3 · impact 6

v3.18.9highCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:Hsecondary · OSV

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-78USprimaryCWE-20USCWE-20USCWE-77USCWE-78USCWE-78US

affected products (5)

Products and version ranges known to be affected.

sebhildebrandt systeminformation≤ < 5.6.4enisa_euvdEU
IBM Corp. IBM Spectrum Protect Plus10.1.0 → 10.1.8fstec_bduRU
Node.js Foundation Node.js≤ 5.6.4fstec_bduRU
systeminformation systeminformation< 5.6.4nvdUScpe:2.3:a:systeminformation:systeminformation:*:*:*:*:*:*:*:*
npm systeminformation< 5.6.4osvUSpkg:npm/systeminformation

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-jff2-qjw8-5476Command Injection Vulnerability in systeminformation2021-04-06ghsa · osvUS
### Impact command injection vulnerability ### Patches Problem was fixed with a parameter check. Please upgrade to version >= 5.6.4 ### Workarounds If you cannot upgrade, be sure to check or sanitize service parameters that are passed to si.inetLatency(), si.inetChecksite(), si.services(), si.processLoad() ... do only allow strings, reject any arrays. String sanitation works as expected.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd osv NVD CVE.org MITRE

published 2021-04-29modified 2026-06-17

related (7,948)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2026-106931US	—OT critical	2.53% (85th)	KEV	2026-10-14
SiteGuard Server Edition contains an OS command injection vulnerability, which may allow an attacker to execute arbitrary OS commands with root or SYSTEM privileges on the system r…
CVE-2026-110447US	critical9.8OT critical	11.6% (96th)	KEV	2026-10-14
Collabora Online Built-in CODE Server before 26.4.303 (richdocumentscode), a Nextcloud app, allows remote code execution, as exploited in the wild in September and October 2026, a…
CVE-2026-105134US	critical10.0OT critical	81.8% (100th)	KEV	2026-10-04
A flaw has been found in Ahsay AhsayCBS up to 9.15.2.69/10.3.4.44. This vulnerability affects unknown code of the file /rps/api/json/UpdateReceivers.do of the component Replication…
CVE-2026-83549US	—OT critical	9.89% (96th)	KEV	2026-09-01
Post-authentication Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability has been identified in the SMA1000 Appliance Management…
CVE-2026-74233US	critical9.8OT critical	3.37% (89th)	—	2026-08-27
Zbtlink WE1326, WE357, WE5926, WE5926-WD, WE826-Q, WE826-T2, WE826-WD, WG108, and WG3526 firmware 19.1101, Zbtlink WE2426-C firmware 19.1112, Zbtlink WE5926-EC_QP firmware 20.0516,…

+7943 more

references (17)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan