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CVE-2025-15660 is a critical vulnerability in Synology MailPlus Server on DiskStation Manager (DSM), identified as ZDI-CAN-28554. According to the provided context, the issue is associated with CWE-338 (Use of Cryptographically Weak Pseudo-Random Number Generator). Successful exploitation allows an adjacent attacker to read arbitrary files, write arbitrary files, and trigger denial-of-service conditions against the service. The specific vulnerable function or code path is not provided in the available content.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical Synology MailPlus Server vulnerability that allows adjacent attackers to manipulate files and disrupt services, associated with use of a cryptographically weak PRNG.
A critical Synology MailPlus Server vulnerability that allows adjacent attackers to read or write arbitrary files and cause denial-of-service.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.