CVE-2026-40541CWE-79cross-site-scripting

CVE-2026-40541

Critical · published August 28, 2026

CVSS v3.1
9.0
EPSS
0%
Percentile
41.4
In the wild
Unconfirmed
What it is

An improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in extract domain in Synology Chat Server before 2.4.5-22148 allows remote authenticated users, via a UI interaction, to read or write arbitrary files and conduct denial-of-service attacks in DSM.

The record
Technical detail
CVSS v3.1
9.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00493 · 41.4th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-08-28T12:16Z
References (1)
https://www.synology.com/en-global/security/advisory/Synology_SA_26_10 · [email protected]
EPSS history
Timeline
  • 28 AUG 07:07Z
    An improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in extract domain in Synology Chat Server before…
    cvelistv5