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3 IOCs

Critical Synology MailPlus Server Bugs Enable File Tampering and DoS Attacks

Cyber Press
Cyber Press
Published June 30, 2026Original Report

Excerpt

Synology has issued critical security updates for its MailPlus Server package running on DiskStation Manager (DSM) , addressing multiple high-impact vulnerabilities that could allow attackers to tamper with files, access internal services, and trigger denial-of-service (DoS) conditions. The most severe issue, tracked as CVE-2026-13136, carries a CVSS v3.1 score of 10.0, indicating maximum severity. The advisory highlights three vulnerabilities, including two critical flaws…

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Indicators of Compromise

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3 indicators

TypeIndicatorConfidenceScoreFirst Seen
CVECVE-2025-15660MediumScore 54/100First seen
CVECVE-2026-13136MediumScore 54/100First seen
CVECVE-2026-13135MediumScore 54/100First seen

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