CVE-2026-41551: Critical Path Traversal in ROS# Exposes Arbitrary Files
The National Vulnerability Database has issued a critical advisory for CVE-2026-41551, a path traversal vulnerability impacting all versions of ROS# prior to V2.2.2. This flaw stems from improper sanitization of user input, creating a severe risk for organizations leveraging this framework.
According to the National Vulnerability Database, this vulnerability (CVSS 9.1, Critical) allows a remote attacker to access arbitrary files on a vulnerable device. The attack vector is network-based with low complexity and no user interaction required. This is a direct path to sensitive data exposure, and potentially further system compromise, if an attacker can pivot from file access.
Defenders must prioritize patching. A path traversal vulnerability of this severity is a gift to attackers seeking initial access or lateral movement. It’s not just about data exfiltration; it’s about what an attacker can learn and leverage once they can read arbitrary files. Assume compromise if you’re running unpatched versions and investigate immediately.
What This Means For You
- If your organization utilizes ROS# in any capacity, immediately identify all instances running versions prior to V2.2.2. Prioritize patching to V2.2.2 or later to mitigate CVE-2026-41551. After patching, audit system logs for any anomalous file access patterns that might indicate prior exploitation.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-41551: ROS# Path Traversal - Arbitrary File Access
title: CVE-2026-41551: ROS# Path Traversal - Arbitrary File Access
id: scw-2026-05-12-ai-1
status: experimental
level: critical
description: |
Detects attempts to exploit the CVE-2026-41551 vulnerability in ROS# by looking for path traversal sequences ('../') within the URI or URI query parameters. This indicates an attacker trying to access arbitrary files outside the intended web root.
author: SCW Feed Engine (AI-generated)
date: 2026-05-12
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-41551/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '../'
cs-uri-query|contains:
- '../'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-41551 | Path Traversal | ROS# versions < V2.2.2 |
| CVE-2026-41551 | Path Traversal | Improper neutralization of user input in ROS# |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 12, 2026 at 13:16 UTC |
This content was AI-rewritten and enriched by Shimi's Cyber World based on the original source. All intellectual property rights remain with the original author.
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