CVE-2026-34795

HighPublic PoCRCE

Published: 02 April 2026

Published

02 April 2026

Modified

07 April 2026

KEV Added

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Patch

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CVSS Score 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0046 64.3th percentile

Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-34795 is a high-severity OS Command Injection (CWE-78) vulnerability in Endian Firewall Community. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 35.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 1 other technique. What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match

prevent

Implements comprehensive input validation at entry points like the DATE parameter, directly preventing command injection from incomplete regex checks.

SI-2 Flaw Remediation good match

prevent

Requires timely identification, testing, and deployment of patches to remediate the specific command injection flaw in logs_log.cgi.

AC-6 Least Privilege partial match

prevent

Enforces least privilege on the CGI process to limit the scope and impact of any successfully injected OS commands.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1059.004 Unix Shell Execution

Adversaries may abuse Unix shell commands and scripts for execution.

attack.mitre.org →

Why these techniques?

Command injection vulnerability in public-facing CGI script (/cgi-bin/logs_log.cgi) on firewall web interface enables exploitation of public-facing application (T1190) and arbitrary OS command execution via Unix Shell (T1059.004).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

NVD Description

Endian Firewall version 3.3.25 and prior allow authenticated users to execute arbitrary OS commands via the DATE parameter to /cgi-bin/logs_log.cgi. The DATE parameter value is used to construct a file path that is passed to a Perl open() call, which…

allows command injection due to an incomplete regular expression validation.

Deeper analysisAI

CVE-2026-34795 is a command injection vulnerability (CWE-78) affecting Endian Firewall versions 3.3.25 and prior. The flaw exists in the /cgi-bin/logs_log.cgi script, where the DATE parameter is used to construct a file path passed directly to a Perl open() call. Due to incomplete regular expression validation of the parameter, attackers can inject arbitrary OS commands. The vulnerability received a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) and was published on 2026-04-02.

An authenticated user with low privileges can exploit this vulnerability remotely over the network with low complexity and no user interaction required. Successful exploitation allows execution of arbitrary operating system commands on the firewall appliance, potentially leading to full compromise including high-impact confidentiality, integrity, and availability violations such as data theft, modification, or denial of service.

Mitigation details are provided in vendor and third-party advisories, including the Endian Community help section at https://help.endian.com/hc/en-us/sections/360004371358-Community and the VulnCheck advisory at https://www.vulncheck.com/advisories/endian-firewall-cgi-bin-logs-log-cgi-date-perl-command-injection. Security practitioners should consult these resources for patch availability, workarounds, and upgrade guidance.