Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-38557

26
FAUCET Score

CVE-2021-38557 is a critical vulnerability in RaspAP 2.6.6's raspap-webgui, allowing authenticated attackers to execute arbitrary commands as root due to insecure sudoers permissions. The www-data account can overwrite and then execute a script as root without a password, leading to complete system compromise. With a CVSS score of 8.8 (High), this network-exploitable flaw has severe impacts on confidentiality, integrity, and availability. While no public exploits or active exploitation have been observed, and community discussion is minimal, the potential for a full system takeover makes it a significant risk.

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
2.22%
Probability of exploitation in next 30 days
EPSS Percentile
80.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0222 is in the 79th percentile among its peer group of 17,844 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-536p-4pcj-5mr9high

raspap-webgui in RaspAP 2.6.6 allows attackers to execute commands as root because of the insecure sudoers permissions.

Sep 2, 2021

References

github.com / RaspAP/raspap-webgui
Product
github.com / RaspAP/raspap-webgui/blob/fabc48c7daae4013b9888f266332e510b196a062/installers/raspap.sudoers
Third Party Advisory
zerosecuritypenetrationtesting.com
ExploitThird Party AdvisoryURL Repurposed