CVE-2025-53471 Overview
CVE-2025-53471 affects Emerson ValveLink products, which receive input or data but fail to validate or incorrectly validate that the input meets required properties for safe and correct processing. The flaw is categorized as improper input validation [CWE-20]. A local attacker with no privileges can leverage the weakness to compromise integrity on the host running ValveLink software. The vulnerability was published to the National Vulnerability Database (NVD) on July 11, 2025, and coordinated public disclosure was handled through CISA advisory ICSA-25-189-01.
Critical Impact
Local exploitation can tamper with ValveLink data or configuration, undermining the integrity of valve diagnostics and control workflows in operational technology (OT) environments.
Affected Products
- Emerson ValveLink products (per vendor advisory)
- ValveLink DTM, SNAP-ON, SOLO, PRM, and Mobile variants referenced in CISA ICSA-25-189-01
- Engineering workstations that host vulnerable ValveLink software
Discovery Timeline
- 2025-07-11 - CVE-2025-53471 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-53471
Vulnerability Analysis
Emerson ValveLink products accept input without enforcing the property checks required to process that data safely. The attack requires local access (AV:L) and high attack complexity, but no privileges or user interaction, and it targets the integrity of the affected component. Successful exploitation does not directly expose confidential data or crash the process, yet it lets an attacker introduce malformed values that ValveLink treats as trusted. In an industrial control system (ICS) context, that manipulated input can propagate into valve configuration data, diagnostic records, or operational parameters exchanged with field devices.
According to the Exploit Prediction Scoring System (EPSS) data supplied with this CVE, active exploitation likelihood is low, and no public proof-of-concept has been published.
Root Cause
The root cause is missing or incorrect input validation in ValveLink components that accept structured data. When ValveLink parses this input, it does not enforce type, length, or range constraints defined by [CWE-20]. As a result, crafted values reach downstream logic and modify state that should require validated input.
Attack Vector
An attacker must already have local access to a workstation running ValveLink. From there, the attacker supplies crafted input through supported ValveLink data interfaces or files. Because the flaw is limited to integrity, the attacker cannot use it to read protected data or halt the service directly, but they can influence values that ValveLink writes or interprets. Review the CISA ICS Advisory ICSA-25-189-01 and the GitHub CSAF Document for the authoritative technical description.
No verified exploit code is available. See the vendor advisory for technical details.
Detection Methods for CVE-2025-53471
Indicators of Compromise
- Unexpected modifications to ValveLink configuration files, diagnostic records, or device tag data on engineering workstations.
- Local process activity that reads or writes ValveLink data stores outside normal operator workflows.
- Anomalous input files or serialized payloads staged in ValveLink working directories before software launch.
Detection Strategies
- Monitor endpoint telemetry on ValveLink hosts for unauthorized file writes to ValveLink application and data directories.
- Baseline the processes, users, and scheduled tasks that legitimately interact with ValveLink, and alert on deviations.
- Correlate local logon events with subsequent ValveLink activity to identify unattended or off-hours interaction.
Monitoring Recommendations
- Enable file integrity monitoring on ValveLink installation paths and configuration stores.
- Forward Windows security and application logs from engineering workstations to a central analytics platform for retention and query.
- Track Emerson advisories through the Emerson Security Notifications page for updated indicators and fixes.
How to Mitigate CVE-2025-53471
Immediate Actions Required
- Inventory every host running Emerson ValveLink and confirm versions against the vendor advisory.
- Restrict interactive and remote logon on ValveLink workstations to a defined list of engineering accounts.
- Apply the principle of least privilege so that only authorized users can supply input files or configuration data to ValveLink.
Patch Information
Emerson publishes fixed installers through the Emerson Software Downloads portal, and remediation guidance is tracked in CISA ICS Advisory ICSA-25-189-01 and the associated GitHub CSAF Document. Verify the fixed version referenced in the advisory before deployment, and coordinate updates with plant change-management procedures.
Workarounds
- Isolate ValveLink workstations on segmented OT networks with no direct internet exposure, per CISA ICS defense-in-depth guidance.
- Disable removable media and block untrusted file transfers into ValveLink hosts until patched.
- Require multi-person review before importing configuration files or diagnostic data into ValveLink.
# Configuration example: audit ValveLink directories on Windows engineering workstations
auditpol /set /subcategory:"File System" /success:enable /failure:enable
icacls "C:\Program Files (x86)\Emerson\ValveLink" /inheritance:r
icacls "C:\Program Files (x86)\Emerson\ValveLink" /grant:r "Engineers:(OI)(CI)RX" "Administrators:(OI)(CI)F"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
