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Critical9.0Vendor: HighSynology Updated

Critical [CVE-2026-40541 +2] improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in extract domain in Synology Chat Server before 2.4.5-22148 allows remote authenticated users, via a UI interaction, to read or write arbitrary files and conduct denial-of-service attacks in DSM

Synology has released a security update for the Synology Chat Server package in DSM to address multiple vulnerabilities: CVE-2026-40541 allows remote authenticated users to read or write arbitrary files and conduct denial-of-service attacks. CVE-2026-9491 allows remote authenticated users to obtain non-sensitive information. Please refer to the ' Affected products named by the advisory: Synology Chat Server for DSM 7.3; Synology Chat Server for DSM 7.2.2; Synology Chat Server for DSM 7.2.1.

CVE-2026-40541CVE-2026-9491CVE-2026-9548
DSM (DiskStation Manager)
Aug 28, 2026
Critical9.8Synology

Critical [CVE-2025-12686] 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

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. Affected products named by the advisory: BeeStation OS 1.3; BeeStation OS 1.2; BeeStation OS 1.1; BeeStation OS 1.0.

CVE-2025-12686
BeeStation
May 27, 2026