CVE-2026-40534

MediumCVSS 5.4/10Last modified Sep 18, 2026

Description

An improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Video API in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-72806-7 and 7.3.2-86009-2 allows remote authenticated users to read or write limited files when the player is launched.

Metrics

CVSS 3.1 5.4/10CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-79

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
Synology	DiskStation Manager (DSM)	>= 7.3, < 7.3.2-86009-2; >= 7.2.2, < 7.2.2-72806-7; >= 7.2.1, < 7.2.1-69057-10

References

https://www.synology.com/en-global/security/advisory/Synology_SA_26_06

Timeline

Published: Sep 18, 2026
Last modified: Sep 18, 2026
NVD status: Awaiting Analysis

Related CVEs from 2026

CVE-2026-405356.5An improper limitation of a pathname to a restricted directory ('path traversal') vulnerability in Desktop API in Synology DiskStation Manag CVE-2026-405364.3An improper limitation of a pathname to a restricted directory ('path traversal') vulnerability in Audio API in Synology DiskStation Manager CVE-2026-405374.3A server-side request forgery (SSRF) vulnerability in PersonMail API in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-7280 CVE-2026-405383.7An improper restriction of excessive authentication attempts vulnerability in Auto block in Synology DiskStation Manager (DSM) before 7.2.1-CVE-2026-405397.1An improper certificate validation vulnerability in Email API in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-72806-7 and CVE-2026-40546.5Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 Fail to validate the response body of proxied images, which allo CVE-2026-405419.0An improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in extract domain in Synology Chat Ser CVE-2026-405427.3Missing critical step in authentication in Apache HttpClient 5.6 allows an attacker to cause the client to accept SCRAM-SHA-256 authenticati CVE-2026-405438.8SOPlanning does not enforce authorization for backup functionalities. An unauthenticated attacker can directly query backup-related endpoint CVE-2026-405445.1SOPlanning is vulnerable to Stored Cross-Site Scripting (XSS) via /process/upload_backup endpoint. An authenticated attacker with access to CVE-2026-405455.1SOPlanning is vulnerable to Reflected XSS via the taches parameter. An attacker can craft a malicious URL which, when opened by authenticate CVE-2026-405468.7SOPlanning is vulnerable to SQL Injection across multiple endpoints and parameters. Attacker with low privileges can inject arbitrary SQL co