cve.bz

CVE-2026-18596 synology diskstation manager (dsm)

8.1 highEPSS 0.7%

High (8.1) in synology diskstation manager (dsm). EPSS 0.7% estimated probability of exploitation activity in the next 30 days.

On this page
An authentication bypass using an alternate path or channel vulnerability in the OTP in Synology DiskStation Manager (DSM) before 7.3.2-86009-5 and 7.4.1-90080-1 allows remote attackers with valid user credentials to read or write arbitrary files and conduct denial-of-service attacks.

Severity

CVSS 3.1

8.1 high
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
0.7% estimated probability of exploitation activity in the next 30 days; 52nd percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
CWE
CWE-288 Authentication Bypass Using an Alternate Path or Channel
OWASP Top 10
A07:2025 Authentication Failures
Published
Modified
Assigned by
synology (CNA)
NVD analysis
Awaiting analysis
Record from
the NVD, synced

Ask an AI about this CVE

ChatGPTClaudeGoogle AI Mode

Show the promptExplain CVE-2026-18596 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-18596?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-18596?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-18596 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.

Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.

Badge for a README or a site

CVE-2026-18596

An image that stays current: it is drawn from the data each time it is fetched (a host that proxies images, as GitHub does, may show its copy for a while). Markdown:

[![CVE-2026-18596](https://cve.bz/cve/badge/CVE-2026-18596.svg)](https://cve.bz/cve/CVE-2026-18596)

HTML:

<a href="https://cve.bz/cve/CVE-2026-18596"><img src="https://cve.bz/cve/badge/CVE-2026-18596.svg" alt="CVE-2026-18596"></a>

Affected

  • synology:diskstation manager (dsm)

Versions

From the CNA's record in the CVE List.

ProductAffected
Synology DiskStation Manager (DSM)from 7.4.1 before 7.4.1-90080-1
Synology DiskStation Manager (DSM)from 7.3.2 before 7.3.2-86009-5

Attack patterns (CAPEC)

  • CAPEC-127 Directory Indexing Likelihood: High · Severity: Medium
  • CAPEC-665 Exploitation of Thunderbolt Protection Flaws Likelihood: Low · Severity: Very High

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

References

Check your stackJSON