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Multiple Critical Vulnerabilities in Synology DSM Enable Remote DoS and Data Compromise

Favicon for www.cert.ssi.gouv.fr CERT-FR Security Advisories
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Summary

CERT-FR issued an advisory covering 12 CVEs (CVE-2026-4036 through CVE-2026-40540) affecting Synology DiskStation Manager. Affected versions include DSM 7.2.1-x prior to 7.2.1-69057-10, DSM 7.2.2-x prior to 7.2.2-72806-7, and DSM 7.3.2-x prior to 7.3.2-86009-2. The vulnerabilities enable remote denial-of-service attacks, data integrity and confidentiality compromise, server-side request forgery (SSRF), cross-site scripting (XSS), and SQL injection. Organizations using affected Synology DSM installations should apply patches referenced in Synology Security Advisories Synology_SA_26_06 and Synology_SA_26_07.

“De multiples vulnérabilités ont été découvertes dans Synology DSM.”

— CERT-FR , verbatim from source
Published by CERT-FR on cert.ssi.gouv.fr . Detected, standardized, and enriched by GovPing. Review our methodology and editorial standards .

About this source

CERT-FR is the French government's national cybersecurity incident response team, run by the ANSSI. Their advisory feed publishes vulnerability disclosures, active exploitation warnings, and emergency patching guidance for software in widespread enterprise use: browsers, hypervisors, ERP systems, network equipment, file transfer products. Around 180 advisories a month. The advisories are written in French but cover the same vulnerability universe as CISA, NCSC-UK, BSI's CERT-Bund, and JPCERT, often hours earlier on European-headquartered vendors. Watch this if you patch enterprise software, run a SOC, write detection content, or track Schneider, Dassault, OVH, Atos, or any French-vendor advisory faster than English-language sources will surface it. GovPing publishes each advisory with the affected vendor, severity, and CERT-FR link.

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What changed

CERT-FR published an advisory identifying 12 vulnerabilities in Synology DiskStation Manager spanning multiple DSM versions. The vulnerabilities expose affected systems to remote denial-of-service, data integrity breaches, data confidentiality breaches, server-side request forgery, cross-site scripting, and SQL injection attacks. Specific patched versions are identified for each affected DSM release line: 7.2.1-69057-10, 7.2.2-72806-7, and 7.3.2-86009-2.

Organizations operating Synology NAS devices running any of the affected DSM versions should apply the vendor-provided patches immediately. IT and cybersecurity teams should cross-reference the Synology security bulletins (SynologySA2606 and SynologySA2607, both dated 15 April 2026) to obtain the correct patch version for their specific deployment.

Archived snapshot

Apr 24, 2026

GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.

Premier Ministre S.G.D.S.N

Agence nationale
de la sécurité des
systèmes d'information

Paris, le 24 avril 2026 N° CERTFR-2026-AVI-0491 Affaire suivie par: CERT-FR

Avis du CERT-FR

Objet: Multiples vulnérabilités dans Synology DSM

Gestion du document

| Référence | CERTFR-2026-AVI-0491 |
| Titre | Multiples vulnérabilités dans Synology DSM |
| Date de la première version | 24 avril 2026 |
| Date de la dernière version | 24 avril 2026 |
| Source(s) | Bulletin de sécurité Synology SynologySA2606 du 15 avril 2026
Bulletin de sécurité Synology SynologySA2607 du 15 avril 2026 |
Une gestion de version détaillée se trouve à la fin de ce document.

Risques

  • Atteinte à l'intégrité des données
  • Atteinte à la confidentialité des données
  • Contournement de la politique de sécurité
  • Déni de service à distance
  • Falsification de requêtes côté serveur (SSRF)
  • Injection de code indirecte à distance (XSS)
  • Injection SQL (SQLi)

Systèmes affectés

  • DSM versions 7.2.1-x antérieures à 7.2.1-69057-10
  • DSM versions 7.2.2-x antérieures à 7.2.2-72806-7
  • DSM versions 7.3.2-x antérieures à 7.3.2-86009-2

Résumé

De multiples vulnérabilités ont été découvertes dans Synology DSM. Certaines d'entre elles permettent à un attaquant de provoquer un déni de service à distance, une atteinte à la confidentialité des données et une atteinte à l'intégrité des données.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Documentation

Gestion détaillée du document

  1. le 24 avril 2026 Version initiale

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Source

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CERT-FR Security Advisories cert.ssi.gouv.fr/avis
Data Privacy & Cybersecurity

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Classification

Agency
CERT-FR
Published
April 24th, 2026
Instrument
Guidance
Branch
Executive
Source language
fr
Legal weight
Non-binding
Stage
Final
Change scope
Substantive

Who this affects

Applies to
Organizations using Synology NAS devices Technology companies Government agencies
Industry sector
5112 Software & Technology
Activity scope
Vulnerability management Patch deployment NAS storage security
Geographic scope
France FR

Taxonomy

Primary area
Cybersecurity
Operational domain
IT Security
Topics
Data Privacy

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