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CVE-2021-38556

32
FAUCET Score

CVE-2021-38556 is a critical command injection vulnerability affecting RaspAP 2.6.6, specifically within the includes/configure_client.php component. This flaw allows authenticated attackers to execute arbitrary commands on the underlying system with high impact to confidentiality, integrity, and availability. While the vulnerability carries a high CVSS score of 8.8 and a high FAUCET Risk Score of 91/100, there is currently no public exploit code available (Metasploit, Nuclei, ExploitDB) and no evidence of active exploitation. Furthermore, there is minimal community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.6.6CPE matchmatch criteria
cpe:2.3:a:raspap:raspap:2.6.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
13.04%
Probability of exploitation in next 30 days
EPSS Percentile
95.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1304 is in the 95th percentile among its peer group of 17,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

composerGHSA-7vph-p634-vrqfhigh

Command Injection in RaspAP 2.6.6

Sep 2, 2021

References

github.com / RaspAP/raspap-webgui
Product
github.com / RaspAP/raspap-webgui/blob/0e1d652c5e55f812aaf2a5908884e9db179416ee/includes/configure_client.php
Third Party Advisory
zerosecuritypenetrationtesting.com
ExploitThird Party AdvisoryVDB EntryURL Repurposed