CVE-2021-42324

Root command execution via capture parameter metacharacters

Published Apr 5, 2022 · Updated Aug 4, 2024

OS command injection in DCN S4600-10P-SI firmware before R0241.0470 allows local users to execute system commands as root. The console capture command accepts parameters containing shell metacharacters without sufficient validation, allowing commands to escape its sandbox. Exploitation requires low-privileged credentials and physical console access; command output appears on the serial interface.

CVSS severity7.4
High
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in DCN S4600-10P-SI firmware before R0241.0470 allows local users to execute system commands as root. The console capture command accepts parameters containing shell metacharacters without sufficient validation, allowing commands to escape its sandbox. Exploitation requires low-privileged credentials and physical console access; command output appears on the serial interface.

The record

CVE
CVE-2021-42324
Published
Apr 5, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059, T1068
Attack vector
physical
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 5, 2022CVE 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorphysical
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.4NIST NVDCVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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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