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CVE-2021-27201

28
FAUCET Score

CVE-2021-27201 describes a critical command injection vulnerability in Endian Firewall Community (EFW) version 3.3.2. Remote authenticated attackers can execute arbitrary operating system commands by injecting shell metacharacters into a backup comment field. With a CVSS score of 8.8 (High), this flaw allows for complete compromise of confidentiality, integrity, and availability of the affected system, requiring only low privileges and no user interaction. While no public exploits, Metasploit modules, or active exploitation have been identified, the vulnerability is straightforward to exploit given authenticated access. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
3.3.2CPE matchmatch criteria
cpe:2.3:a:endian:firewall_community:3.3.2:*:*:*:*:*:*:*

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
2.61%
Probability of exploitation in next 30 days
EPSS Percentile
83.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0261 is in the 82nd percentile among its peer group of 17,823 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

Remediation records are not available for this CVE.

References

github.com / MucahitSaratar/endian_firewall_authenticated_rce
ExploitThird Party Advisory
sourceforge.net / projects/efw/files/Development/EFW-3.3.2
Release NotesThird Party Advisory
endian.com / company/news/endian-community-releases-new-version-332-148
Release NotesVendor Advisory