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CVE-2025-66592

An origin validation error vulnerability in Synology Active Backup for Business Agent before 3.1.0-4967 allows local users to write arbitrary files with restricted content during installation.

Published: May 27, 2026Updated: May 27, 2026 Sources: CVE List NVD
NVD MITRE
6.1CVSS
MEDIUM

An origin validation error vulnerability in Synology Active Backup for Business Agent before 3.1.0-4967 allows local users to write arbitrary files with restricted content during installation.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:LAC:LPR:NUI:RS:UC:NI:LA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:HAvailability
High

Weaknesses

CWE-346

Affected Products

Synology Active Backup for Business Agent
Synology

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://www.synology.com/en-global/security/advisory/Synology_SA_25_16
synology.com

Timeline

Published
May 27, 2026
Last Updated
May 27, 2026

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