CVE-2025-66593
Synology Assistant Origin Validation Error File Write Vulnerability
Description
An origin validation error vulnerability in Synology Assistant before 7.0.6-50085 allows local users to write arbitrary files with restricted content and conduct denial-of-service during installation.
INFO
Published Date :
May 27, 2026, 9:16 a.m.
Last Modified :
June 2, 2026, 4:09 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | db201096-a0cc-46c7-9a55-61d9e221bf01 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Synology Assistant to version 7.0.6-50085 or later.
- Apply vendor patches for Synology Assistant.
- Validate installation file write restrictions.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-66593.
| URL | Resource |
|---|---|
| https://www.synology.com/en-global/security/advisory/Synology_SA_25_17 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-66593 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-66593
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-66593 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-66593 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Modified Analysis by [email protected]
Jun. 02, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:H Removed CVSS V3.1 AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N -
CVE Modified by [email protected]
Jun. 02, 2026
Action Type Old Value New Value Changed Description An origin validation error vulnerability in Synology Assistant before 7.0.6-50085 allows local users to write arbitrary files with restricted content during installation. An origin validation error vulnerability in Synology Assistant before 7.0.6-50085 allows local users to write arbitrary files with restricted content and conduct denial-of-service during installation. -
Initial Analysis by [email protected]
Jun. 01, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N Added CPE Configuration OR *cpe:2.3:a:synology:assistant:*:*:*:*:*:*:*:* versions up to (excluding) 7.0.6-50085 Added Reference Type Synology Inc.: https://www.synology.com/en-global/security/advisory/Synology_SA_25_17 Types: Vendor Advisory -
New CVE Received by [email protected]
May. 27, 2026
Action Type Old Value New Value Added Description An origin validation error vulnerability in Synology Assistant before 7.0.6-50085 allows local users to write arbitrary files with restricted content during installation. Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H Added CWE CWE-346 Added Reference https://www.synology.com/en-global/security/advisory/Synology_SA_25_17