ZDI-26-423: Synology DiskStation DS925+ MailPlus Redis Weak Cryptography for Passwords Remote Code Execution Vulnerability
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.
AI Analysis
Technical Summary
CVE-2025-15660 is a high-severity vulnerability affecting Synology DiskStation DS925+ devices specifically in the MailPlus Redis instance. The vulnerability arises from weak cryptographic handling of passwords, which are stored in a recoverable encrypted format. This weakness enables network-adjacent attackers to execute arbitrary code with root privileges without requiring authentication. The vulnerability has a CVSS score of 8.8 and was publicly disclosed on July 15, 2026. Synology has issued an official update to remediate this flaw.
Potential Impact
Successful exploitation allows an unauthenticated, network-adjacent attacker to execute arbitrary code on the affected device with root privileges. This can lead to full compromise of the device, including confidentiality, integrity, and availability impacts.
Mitigation Recommendations
Synology has released an official update that corrects this vulnerability. Users of Synology DiskStation DS925+ devices should apply the vendor-provided update promptly to remediate the issue.
ZDI-26-423: Synology DiskStation DS925+ MailPlus Redis Weak Cryptography for Passwords Remote Code Execution Vulnerability
Description
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-15660 is a high-severity vulnerability affecting Synology DiskStation DS925+ devices specifically in the MailPlus Redis instance. The vulnerability arises from weak cryptographic handling of passwords, which are stored in a recoverable encrypted format. This weakness enables network-adjacent attackers to execute arbitrary code with root privileges without requiring authentication. The vulnerability has a CVSS score of 8.8 and was publicly disclosed on July 15, 2026. Synology has issued an official update to remediate this flaw.
Potential Impact
Successful exploitation allows an unauthenticated, network-adjacent attacker to execute arbitrary code on the affected device with root privileges. This can lead to full compromise of the device, including confidentiality, integrity, and availability impacts.
Mitigation Recommendations
Synology has released an official update that corrects this vulnerability. Users of Synology DiskStation DS925+ devices should apply the vendor-provided update promptly to remediate the issue.
Technical Details
- Article Source
- {"url":"http://www.zerodayinitiative.com/advisories/ZDI-26-423/","fetched":true,"fetchedAt":"2026-07-16T15:51:08.237Z","wordCount":187}
- Classification
- {"confidence":0.95,"severitySource":"cvss-text","classifier":"rss-v2"}
Threat ID: 6a58fe6768715ace43485c2c
Added to database: 07/16/2026, 15:53:11 UTC
Last enriched: 08/07/2026, 06:04:04 UTC
Last updated: 08/25/2026, 21:13:06 UTC
Views: 78
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