CVE-2026-28373

Critical

Published: 03 April 2026

Published

03 April 2026

Modified

07 April 2026

KEV Added

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Patch

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CVSS Score 9.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

EPSS Score 0.0004 11.3th percentile

Risk Priority 19 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-28373 is a critical-severity Path Traversal (CWE-22) vulnerability in Rcesecurity (inferred from references). Its CVSS base score is 9.6 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Malicious File (T1204.002); ranked at the 11.3th 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 Malicious File (T1204.002) 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

Requires validation of the filePath property in decryption functionality to block path traversal sequences like '../' that enable arbitrary file writes.

SI-2 Flaw Remediation good match

prevent

Mandates timely remediation of the path traversal flaw by updating to Stackfield Desktop App version 1.10.2 or later.

SI-4 System Monitoring partial match

detect

Enables monitoring of filesystem for unauthorized or anomalous file writes resulting from path traversal exploitation.

MITRE ATT&CK Enterprise TechniquesAI

T1204.002 Malicious File Execution

An adversary may rely upon a user opening a malicious file in order to gain execution.

attack.mitre.org →

T1203 Exploitation for Client Execution Execution

Adversaries may exploit software vulnerabilities in client applications to execute code.

attack.mitre.org →

Why these techniques?

Vulnerability is triggered when a user opens a crafted malicious export file in the desktop app (T1204.002), and the resulting arbitrary file write directly enables client-side code execution (T1203) for RCE or further compromise.

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

NVD Description

The Stackfield Desktop App before 1.10.2 for macOS and Windows contains a path traversal vulnerability in certain decryption functionality when processing the filePath property. A malicious export can write arbitrary content to any path on the victim's filesystem.

Deeper analysisAI

The Stackfield Desktop App versions prior to 1.10.2 for macOS and Windows contains a path traversal vulnerability (CWE-22) in its decryption functionality when processing the filePath property. This flaw allows a malicious export file to write arbitrary content to any path on the victim's filesystem, earning a CVSS v3.1 base score of 9.6 (AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H).

A remote attacker without privileges can exploit this vulnerability by crafting a malicious export file and tricking a user into opening or processing it within the affected application. Successful exploitation enables arbitrary file writes across the filesystem, potentially leading to remote code execution, data theft, or system compromise depending on the targeted paths and content written.

Advisories from RCE Security detail the vulnerability and its path to RCE, recommending immediate updates to Stackfield Desktop App version 1.10.2 or later to mitigate the issue. The vendor's desktop apps page provides download links for patched versions.