CVE-2026-3120

HighRCE

Published: 04 May 2026

Published

04 May 2026

Modified

05 May 2026

KEV Added

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Patch

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CVSS Score 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0007 21.3th percentile

Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-3120 is a high-severity Code Injection (CWE-94) vulnerability in Gov (inferred from references). Its CVSS base score is 7.2 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 21.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

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-2 Flaw Remediation good match

prevent

Directly mitigates the code injection vulnerability by requiring timely flaw remediation through upgrading SambaBox to version 5.3 or later.

SI-10 Information Input Validation good match

prevent

Prevents OS command injection by enforcing information input validation to detect and reject malicious code in user-supplied inputs.

AC-6 Least Privilege partial match

prevent

Reduces exploitation risk and impact by enforcing least privilege, limiting high-privilege (PR:H) access necessary for successful command injection.

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?

OS command injection in network-accessible SambaBox management interface directly enables T1190 (exploit of public-facing app, even with required admin auth) and T1059.004 (arbitrary Unix shell command execution).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

Improper Control of Generation of Code ('Code Injection') vulnerability in Profelis Information and Consulting Trade and Industry Limited Company SambaBox allows OS Command Injection. This issue affects SambaBox: from 5.1 before 5.3.

Deeper analysisAI

CVE-2026-3120 is an Improper Control of Generation of Code ('Code Injection') vulnerability in SambaBox from Profelis Information and Consulting Trade and Industry Limited Company. The flaw enables OS Command Injection and affects SambaBox versions from 5.1 up to but not including 5.3. It is classified under CWE-94 and received a CVSS v3.1 base score of 7.2 (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H), indicating high severity due to its potential for significant impact.

Attackers can exploit this vulnerability over the network with low complexity, but it requires high privileges (PR:H), such as those held by authenticated administrative users. No user interaction is necessary, and the scope remains unchanged. Successful exploitation grants high impacts across confidentiality, integrity, and availability, allowing attackers to inject and execute arbitrary OS commands on the affected system.

The advisory published by USOM at https://www.usom.gov.tr/bildirim/tr-26-0155 provides further details on the issue. Mitigation involves upgrading to SambaBox version 5.3 or later, as versions from 5.1 before 5.3 are vulnerable.