# CVE-2025-30421: Stack-based Buffer Overflow in DrObjectStorage::XML_Serialize() in NI Circuit Design Suite

> A stack-based buffer overflow in NI Circuit Design Suite allows arbitrary code execution or information disclosure when a user opens a malicious .sym file.

- **Severity:** High 8.5 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 15 May 2025
- **Updated:** 15 May 2025
- **Also known as:** GHSA-5ppx-9rrh-j4wr

## What is CVE-2025-30421?

CVE-2025-30421 is a high-severity memory corruption vulnerability in NI Circuit Design Suite, published on 15 May 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

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.

Weakness: CWE-787 (Out-of-bounds Write), CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2025-30421?

It affects 1 product.


Products: Ni Circuit Design Suite.

## How do I fix CVE-2025-30421?

No fix has been published for CVE-2025-30421 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-30421 being exploited?

There is no known exploitation of CVE-2025-30421 in the wild and no public exploit code.

## Other vulnerabilities in NI Circuit Design Suite

- [CVE-2025-6033](https://insights.sbomify.com/CVE-2025-6033/): Memory Corruption issue in XML_Serialize() in NI Circuit Design Suite (high 8.5)
- [CVE-2025-6034](https://insights.sbomify.com/CVE-2025-6034/): Out of Bounds Read in DefaultFontOptions() in NI Circuit Design Suite (high 8.5)
- [CVE-2025-30417](https://insights.sbomify.com/CVE-2025-30417/): Out of Bounds Write in Library!DecodeBase64() in NI Circuit Design Suite (high 8.5)
- [CVE-2025-30418](https://insights.sbomify.com/CVE-2025-30418/): Out of Bounds Write in CheckPins() in NI Circuit Design Suite (high 8.5)
- [CVE-2025-30419](https://insights.sbomify.com/CVE-2025-30419/): Out of Bounds Read in GetSymbolBorderRectSize() in NI Circuit Design Suite (high 8.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-30421 and fix it if it is affected.

What it is: CVE-2025-30421 is a high-severity memory corruption vulnerability in NI Circuit Design Suite, published on 15 May 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2025-30421 in the wild and no public exploit code.

Affected product: NI Circuit Design Suite. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-30421/ (Markdown: https://insights.sbomify.com/CVE-2025-30421/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-30421
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-30421
- OSV: https://osv.dev/vulnerability/CVE-2025-30421

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-30421/
Summaries are generated and may contain mistakes; the official description above is the record.