How severe is CVE-2025-30028?

CVE-2025-30028 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-30028 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-30028?

CVE-2025-30028 primarily affects Synology Active Backup For Business. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-30028?

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-2025-30028 have an EU (EUVD) identifier?

Yes. CVE-2025-30028 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209961.

When was CVE-2025-30028 published?

CVE-2025-30028 was published on 2026-05-27 and last updated on 2026-06-17.

CVE-2025-30028

CVE-2025-30028 is a high-severity vulnerability in Synology Active Backup For Business with a CVSS 3.x base score of 8.6. 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-89.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-209961
Weakness: CWE-89
Affected product: Synology Active Backup For Business
Published: 2026-05-27
Last modified: 2026-06-17

Description

A vulnerability in Active Backup for Business allows unauthorized remote attackers to read arbitrary files.

Frequently asked questions

What is CVE-2025-30028?: A vulnerability in Active Backup for Business allows unauthorized remote attackers to read arbitrary files.
How severe is CVE-2025-30028?: CVE-2025-30028 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-30028 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-30028?: CVE-2025-30028 primarily affects Synology Active Backup For Business. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-30028?: 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-2025-30028 have an EU (EUVD) identifier?: Yes. CVE-2025-30028 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209961.
When was CVE-2025-30028 published?: CVE-2025-30028 was published on 2026-05-27 and last updated on 2026-06-17.

References

https://www.synology.com/en-global/security/advisory/Synology_SA_25_02

Affected products (3)

cpe:2.3:a:synology:active_backup_for_business:2.7.1-23234:*:*:*:*:*:*:*
cpe:2.3:a:synology:active_backup_for_business:2.7.1-13234:*:*:*:*:*:*:*
cpe:2.3:a:synology:active_backup_for_business:2.7.1-3234:*:*:*:*:*:*:*

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