dbcve.org
Circuit Design SuiteApplication · Ni

CVE-2025-30421

HIGH · 7.8 CVSS v3.1 Published 2025-05-15
Fix available
A fix is available. Upgrade to 14.3.1 or later.
See remediation →
81/100
Remediation priority · High
No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
There is a memory corruption vulnerability due to a stack-based buffer overflow in DrObjectStorage::XML_Serialize() when using the SymbolEditor in NI Circuit Design Suite.  This vulnerability may result in information disclosure or arbitrary code execution. Successful exploitation requires an attacker to get a user to open a specially crafted .sym file. This vulnerability affects NI Circuit Design Suite 14.3.0 and prior versions.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

A stack-based buffer overflow exists in DrObjectStorage::XML_Serialize() within the SymbolEditor component of NI Circuit Design Suite 14.3.0 and prior. When parsing specially crafted .sym files, the XML serialization function fails to properly validate buffer boundaries, allowing an attacker to overwrite stack memory and potentially achieve information disclosure or arbitrary code execution.

MitigationUpdate to a version beyond 14.3.0 when available. Until then, exercise extreme caution when opening .sym files from untrusted sources, as exploitation requires only user interaction to open a malicious file.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Circuit Design SuiteApplication
Affected:< 14.3.1

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Verify NI Circuit Design Suite version
    Open NI software and navigate to Help > About, or check Add/Remove Programs in Control Panel for the installed version of NI Circuit Design Suite
    Affected if The installed version is 14.3.0 or any version prior to 14.3.1
  2. Confirm SymbolEditor component presence
    Check if the SymbolEditor module is available within the NI Circuit Design Suite installation by looking for SymbolEditor-related files or functionality in the program directory
    Affected if SymbolEditor component is present and accessible in the installation
  3. Inspect .sym file handling configuration
    Check the application settings or registry for file association handling of .sym files, which are parsed by the vulnerable XML_Serialize() function
    Affected if The application is configured to open or parse .sym files using the SymbolEditor component
  4. Review recent .sym file access
    Check Windows event logs, recent documents, or the application's recent files list for any .sym files opened from untrusted sources
    Affected if Any .sym files have been opened recently, especially from untrusted or external sources

You are affected if NI Circuit Design Suite version is 14.3.0 or prior AND the SymbolEditor component is used to parse .sym files.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 14.3.1 or later
Fixed in 14.3.1
Interim mitigation

Update to a version beyond 14.3.0 when available. Until then, exercise extreme caution when opening .sym files from untrusted sources, as exploitation requires only user interaction to open a malicious file.

Recommended fix Moderate confidence

NI Circuit Design Suite 14.3.1

  1. Check the current installed version of NI Circuit Design Suite (Help > About or through NI MAX)
  2. Back up any custom .sym files, projects, and related data before upgrading
  3. Download NI Circuit Design Suite version 14.3.1 from the official NI website (www.ni.com) or through the NI Update Service/NI Package Manager
  4. Run the installer and follow the on-screen prompts to complete the upgrade
  5. After installation, verify the version shows 14.3.1 in Help > About
  6. Re-test workflows involving the SymbolEditor with .sym files to confirm the vulnerability is resolved
Caveat Review NI's release notes for 14.3.1 to confirm no breaking changes affect your workflows; minor interface or workflow changes may occur between versions

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Circuit Design Suite Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA3.0 h
21.0 hours of engineering $3,680
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,888.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2025-30421 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-30421 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data