Synology vulnerabilities and threats

CVE-2026-9491 is a server-side request forgery (SSRF) vulnerability in the webhook component of Synology Chat Server versions before 2.4.5-22148. It allows remote authenticated users to obtain non-sensitive information from the server. The vulnerability has a medium severity rating with a CVSS score of 4.3. No official patch or remediation guidance has been provided yet by the vendor.

CVE-2026-40541 is a critical cross-site scripting (XSS) vulnerability in Synology Chat Server before version 2.4.5-22148. It involves improper neutralization of input during web page generation, allowing remote authenticated users via UI interaction to read or write arbitrary files and cause denial-of-service conditions in the Synology DiskStation Manager (DSM). The vulnerability has a high CVSS score of 9.0, indicating severe impact on confidentiality, integrity, and availability. No official patch or remediation guidance is currently confirmed from the vendor. No known exploits in the wild have been reported.

CVE-2026-4793 is a high-severity vulnerability in Synology Assistant prior to version 7.0.7-50095. It involves incorrect default permissions that allow local users to read or write arbitrary files and cause denial-of-service during installation. The vulnerability requires local access and user interaction to exploit. No official patch or remediation guidance is currently confirmed.

An improper limitation of a pathname to a restricted directory ('Path Traversal') vulnerability in Backup.Repository webapi component in Synology Hyper Backup before 4.1.2-4036 allows remote authenticated users with administrator privileges to write specific files containing non-sensitive information via unspecified vectors.

An improper limitation of a pathname to a restricted directory ('Path Traversal') vulnerability in Backup Task functionality in Synology Hyper Backup before 4.1.2-4036 allows remote authenticated users to write specific files via unspecified vectors.

A use of get request method with sensitive query strings vulnerability in volume encryption of Synology Storage Manager package before 1.0.1-1100 allows local users on Windows to obtain sensitive information.

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.

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 and conduct denial-of-service during installation.

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

An Exposed Dangerous Method or Function vulnerability in Synology C2 Identity Edge Server package in DSM before 1.76.0-0307 allows remote attackers to obtain user credentials from the edge server.

Origin validation error vulnerability in Synology ActiveProtect Agent before 1.1.0-0439 allows local users to write arbitrary files with restricted content and conduct denial-of-service during installation.

Buffer copy without checking size of input ('Classic Buffer Overflow') vulnerability in AdminCenter in Synology BeeStation OS before 1.3.2-65648 allows remote attackers to execute arbitrary code via unspecified vectors.

Improper check for unusual or exceptional conditions vulnerability in SSO in Synology DiskStation Manager (DSM) before 7.2.2-72806-5 and 7.3.1-86003-1 (7.2.1-69057 is not affected) allows remote attackers to bypass authentication with prior knowledge of the distinguished name (DN).

Improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in contact functionality in Synology Contacts before 1.0.10-20659 allows remote authenticated users to read or write specific files containing non-sensitive information via unspecified vectors.

Improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in Safe Access in Synology Safe Access before 1.3.1-0329 allows remote authenticated users with administrator privileges to read or write specific files containing non-sensitive information or conduct limited denial-of-service in SRM.

Incorrect authorization vulnerability in IO Module functionality in Synology Surveillance Station before 9.2.2-11575 and 9.2.2-9575 allows remote authenticated users with administrator privileges to limited file write via unspecified vectors.

Insufficiently protected credentials vulnerability in IPSpeaker component in Synology Surveillance Station before 9.2.2-11575 and 9.2.2-9575 allows remote authenticated users with administrator privileges to obtain sensitive information via unspecified vectors.

Improper preservation of permissions vulnerability in Archiving Push functionality in Synology Surveillance Station before 9.2.2-11575 and 9.2.2-9575 allows remote authenticated users with administrator privileges to limited file write via unspecified vectors.

Cleartext transmission of sensitive information vulnerability in Export Key functionality in Synology Surveillance Station before 9.2.2-11575 and 9.2.2-9575 allows remote authenticated users with administrator privileges to obtain sensitive information via unspecified vectors.

Missing authorization vulnerability in AddOns functionality in Synology Surveillance Station before 9.2.2-11575 and 9.2.2-9575 allows remote authenticated users with administrator privileges to obtain sensitive information via unspecified vectors.