How severe is CVE-2025-66461?

CVE-2025-66461 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-66461 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-66461?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-66461 have an EU (EUVD) identifier?

Yes. CVE-2025-66461 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201699.

When was CVE-2025-66461 published?

CVE-2025-66461 was published on 2025-12-08 and last updated on 2026-06-17.

CVE-2025-66461

CVE-2025-66461 is a medium-severity vulnerability with a CVSS 3.x base score of 6.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-428.

Key facts

Severity: Medium (CVSS 3.x base score 6.7)
CVSS v4: 8.4
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-201699
Weakness: CWE-428
Published: 2025-12-08
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-66461?: 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.
How severe is CVE-2025-66461?: CVE-2025-66461 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-66461 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-66461?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-66461 have an EU (EUVD) identifier?: Yes. CVE-2025-66461 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201699.
When was CVE-2025-66461 published?: CVE-2025-66461 was published on 2025-12-08 and last updated on 2026-06-17.

References

Other CWE-428 vulnerabilities

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CVE-2020-9292 — Critical (CVSS 9.8): An unquoted service path vulnerability in the FortiSIEM Windows Agent component may allow an attacker to gain elevated…
CVE-2019-17658 — Critical (CVSS 9.8): An unquoted service path vulnerability in the FortiClient FortiTray component of FortiClientWindows v6.2.2 and prior…
CVE-2019-8459 — Critical (CVSS 9.8): Check Point Endpoint Security Client for Windows, with the VPN blade, before version E80.83, starts a process without…

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