CVE-2025-6034

Code execution via DefaultFontOptions out-of-bounds read

Published Sep 30, 2025 · Updated Sep 30, 2025

Out-of-bounds read in NI Circuit Design Suite 14.3.1 and earlier allows attackers to execute code via a crafted .sym file. The Symbol Editor's DefaultFontOptions() routine inadequately validates font-option data and reads beyond its intended memory boundary. Exploitation requires a user to open the file and can disclose process memory or execute code in that user's context.

CVSS severity8.5
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in NI Circuit Design Suite 14.3.1 and earlier allows attackers to execute code via a crafted .sym file. The Symbol Editor's DefaultFontOptions() routine inadequately validates font-option data and reads beyond its intended memory boundary. Exploitation requires a user to open the file and can disclose process memory or execute code in that user's context.

The record

CVE
CVE-2025-6034
Published
Sep 30, 2025
Updated
Sep 30, 2025
Vendor
National Instruments
Product
Circuit Design Suite
Classifications
CWE-125, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=14.3.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

National Instruments · Circuit Design Suiteversion=0 <=14.3.1

Published CVSS scores

7.8National InstrumentsCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.5National InstrumentsCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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