---
id: "CVE-2026-18792"
page: "https://infrastack.ai/live/CVE-2026-18792"
kind: "vulnerability"
aliases: ["CVE-2026-18792"]
title: "Synology DSM: Sharing API path flaw lets logged-in users read or write files"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["dsm", "infrastructure", "nas", "self-hosted", "synology"]
not_affected_if: ["no-untrusted-accounts", "patched-dsm"]
published_at: "2026-11-12T04:17:19+00:00"
first_seen_at: "2026-11-12T04:47:09+00:00"
updated_at: "2026-11-12T04:47:35+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18792", "first_seen_at": "2026-11-12T04:47:09+00:00"}]
exploit_sources: []
---

# Synology DSM: Sharing API path flaw lets logged-in users read or write files

Link for people: https://infrastack.ai/live/CVE-2026-18792 (this .md is for agents)

Synology DiskStation Manager has a path-traversal flaw in its Sharing API that lets a remote, logged-in user read or write arbitrary files on the NAS. It can also be used to cause a denial of service.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the DSM version under Control Panel > Info Center, or run `cat /etc/VERSION` over SSH if enabled
- Compare the result against the fixed versions listed below

## Fix

- DSM `7.3.2-86009-5` or later on the 7.3 branch
- DSM `7.4.1-90080-1` or later on the 7.4 branch

## Timeline

- 2026-11-12T04:47:09+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-18792

## From the sources

An improper limitation of a pathname to a restricted directory vulnerability in the Sharing API in Synology DiskStation Manager (DSM) before 7.3.2-86009-5 and 7.4.1-90080-1 allows remote authenticated users to read or write arbitrary files and conduct denial-of-service attacks.

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_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_