CVE-2021-38556Network attack vector

Authenticated command execution via unescaped network selector

Published Aug 24, 2021 · Updated Aug 4, 2024

Command injection in RaspAP 2.6.6 allows remote authenticated users to execute operating-system commands through Wi-Fi client selection. DisplayWPAConfig concatenates the POST connect value directly into a sudo wpa_cli select_network shell command without quoting or validation. Access to the authenticated Wi-Fi client controls is required, and injected commands execute in the web application host context.

CVSS severity8.8
High
EPSS probability13.04%
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 RaspAP 2.6.6 allows remote authenticated users to execute operating-system commands through Wi-Fi client selection. DisplayWPAConfig concatenates the POST connect value directly into a sudo wpa_cli select_network shell command without quoting or validation. Access to the authenticated Wi-Fi client controls is required, and injected commands execute in the web application host context.

The record

CVE
CVE-2021-38556
Published
Aug 24, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-77, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 24, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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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