How severe is CVE-2025-52861?

CVE-2025-52861 has a CVSS 4.0 base score of 7.0, rated high severity.

Is CVE-2025-52861 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-52861?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-52861 have an EU (EUVD) identifier?

Yes. CVE-2025-52861 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-26230.

When was CVE-2025-52861 published?

CVE-2025-52861 was published on 2025-08-29 and last updated on 2026-06-17.

CVE-2025-52861

CVE-2025-52861 is a high-severity vulnerability with a CVSS 4.0 base score of 7.0. 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-22.

Key facts

Severity: High (CVSS 4.0 base score 7.0)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-26230
Weakness: CWE-22
Published: 2025-08-29
Last modified: 2026-06-17

Description

A path traversal vulnerability has been reported to affect VioStor. If a remote attacker gains an administrator account, they can then exploit the vulnerability to read the contents of unexpected files or system data. We have already fixed the vulnerability in the following version: VioStor 5.1.6 build 20250621 and later

Frequently asked questions

What is CVE-2025-52861?: A path traversal vulnerability has been reported to affect VioStor. If a remote attacker gains an administrator account, they can then exploit the vulnerability to read the contents of unexpected files or system data. We have already fixed the vulnerability in the following version: VioStor 5.1.6 build 20250621 and later
How severe is CVE-2025-52861?: CVE-2025-52861 has a CVSS 4.0 base score of 7.0, rated high severity.
Is CVE-2025-52861 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-52861?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-52861 have an EU (EUVD) identifier?: Yes. CVE-2025-52861 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-26230.
When was CVE-2025-52861 published?: CVE-2025-52861 was published on 2025-08-29 and last updated on 2026-06-17.

References

https://www.qnap.com/en/security-advisory/qsa-25-28

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