A flaw was found in HTTP/2. Using SETTINGS frames and queuing of SETTINGS ACK frames, a flood could occur resulting in unbounded memory growth. The highest threat from this vulnerability is to system availability.

A flaw was found in HTTP/2. An attacker, using PRIORITY frames to flood the system, could cause excessive CPU usage and starvation of other clients. The largest threat from this vulnerability is to system availability.

A flaw was found in HTTP/2. An attacker, sending a stream of header with a 0-length header name and a 0-length header value, could cause some implementations to allocate memory for these headers and keep the allocations alive until the session dies. The can consume excess memory, potentially leading to a denial of service. The highest threat from this vulnerability is to system availability.

A vulnerability was found in http/2 where an attacker opens the HTTP/2 window so the peer can send without constraint; however, they leave the TCP window closed so the peer cannot actually write (many of) the bytes on the wire. The attacker then sends a stream of requests for a large response object. Depending on how the servers queue the responses, this can consume excess memory, CPU, or both, potentially leading to a denial of service.

An incorrect default permissions vulnerability in Synology Assistant before 7.0.7-50095 allows local users to read or write arbitrary files and conduct denial-of-service during installation.

An inclusion of functionality from untrusted control sphere vulnerability in MinGW DLL component in Synology Hyper Backup Explorer before 3.0.1-0156 allows local users to execute arbitrary code 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.

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.

A cleartext transmission of sensitive information vulnerability in Synology Note Station Client before 2.2.4-703 allows man-in-the-middle attackers to obtain user credential.

An inclusion of functionality from untrusted control sphere vulnerability in OpenSSL configuration in Synology Active Backup for Business Recovery Media Creator before 2.5.0-2081 allows local users to execute arbitrary code via unspecified vectors.

This vulnerability allows network-adjacent attackers to access the Redis instance on affected installations of Synology DiskStation DS925+ devices. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 4.3. The following CVEs are assigned: CVE-2026-13135.

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Synology DiskStation DS925+ devices. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2025-15660.

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Synology DiskStation DS925+ devices. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2025-15660.

OpenClaw before 2026.3.22 contains a webhook reply delivery vulnerability that allows attackers to rebind chat replies to unintended users by exploiting mutable username matching instead of stable numeric user identifiers. Attackers can manipulate username changes to redirect webhook-triggered replies to different users, bypassing the intended recipient binding recorded in webhook events.

A buffer overflow vulnerability has been reported to affect File Station 5. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes.

We have already fixed the vulnerability in the following version: File Station 5 5.5.6.5208 and later

A buffer overflow vulnerability has been reported to affect File Station 5. The remote attackers can then exploit the vulnerability to modify memory or crash processes.

We have already fixed the vulnerability in the following version: File Station 5 5.5.6.5243 and later

A buffer overflow vulnerability has been reported to affect File Station 5. The remote attackers can then exploit the vulnerability to modify memory or crash processes.

We have already fixed the vulnerability in the following version: File Station 5 5.5.6.5243 and later

An incorrect authorization vulnerability has been reported to affect File Station 6. If a remote attacker gains a user account, they can then exploit the vulnerability to bypass intended access restrictions.

We have already fixed the vulnerability in the following version: File Station 5 5.5.6.5243 and later

An allocation of resources without limits or throttling vulnerability has been reported to affect File Station 6. If a remote attacker gains a user account, they can then exploit the vulnerability to prevent other systems, applications, or processes from accessing the same type of resource.

We have already fixed the vulnerability in the following version: File Station 5 5.5.6.5243 and later

A missing authorization vulnerability has been reported to affect QuMagie. The remote attackers can then exploit the vulnerability to access unauthorized data or perform unauthorized actions.

We have already fixed the vulnerability in the following version: QuMagie 2.9.0 and later

A NULL pointer dereference vulnerability has been reported to affect File Station 6. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.

We have already fixed the vulnerability in the following version: File Station 5 5.5.6.5208 and later

A vulnerability regarding buffer copy without checking the size of input ('Classic Buffer Overflow') has been found in the login component. This allows remote attackers to write specific files containing non-sensitive information and conduct limited denial-of-service attacks via unspecified vectors. This attack only affects the login service which will automatically restart. The following models with Synology Camera Firmware versions before 1.1.1-0383 may be affected: BC500 and TC500.

Improper limitation of a pathname to a restricted directory ('Path Traversal') vulnerability in file operation management in Synology Presto File Server before 2.1.2-1601 allows remote attackers to write arbitrary files via unspecified vectors.

Improper privilege management vulnerability in summary report management in Synology Presto File Server before 2.1.2-1601 allows remote authenticated users to bypass security constraint via unspecified vectors.

A heap-based buffer overflow was found in the way sudo parses command line arguments.

As per the researcher this vulnerability:

- is exploitable by any local user (normal users and system users, sudoers and non-sudoers), without authentication (i.e., the attacker does not need to know the user's password);

- was introduced in July 2011 (commit 8255ed69), and affects all legacy versions from 1.8.2 to 1.8.31p2 and all stable versions from 1.9.0 to 1.9.5p1, in their default configuration.

This could lead to privilege escalation.

An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC), aka 'Netlogon Elevation of Privilege Vulnerability'.

Improper restriction of communication channel to intended endpoints vulnerability in HTTP daemon in Synology SSL VPN Client before 1.2.4-0224 allows remote attackers to conduct man-in-the-middle attacks via a crafted payload.

Cross-site scripting (XSS) vulnerability in Address Book Editor in Synology CardDAV Server before 6.0.8-0086 allows remote authenticated users to inject arbitrary web script or HTML via the (1) familyname, (2) givenname, or (3) additionalname parameter.

Improper authorization vulnerability in SYNO.Cal.Event in Calendar before 2.1.2-0511 allows remote authenticated users to create arbitrary events via the (1) calid or (2) originalcalid parameter.

Improper access control vulnerability in Synology Drive before 1.0.2-10275 allows remote authenticated users to access non-shared files or folders via unspecified vectors.