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CVE-2026-9548

MEDIUM
6.5
CVSS Score
Published: August 28, 2026 at 07:08 AM UTC
Updated: September 1, 2026 at 09:11 PM UTC
1 product affected across 1 vendorChat

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

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 restricted files and conduct limited denial-of-service attacks in DSM.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Chat· Synology
60%
v < 2.4.5-22148
Affected range stops below 2.4.5-22148, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://www.synology.com/en-global/security/advisory/Synology_SA_26_10

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMsynology
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
Vector?

Quick Info

StatusUNDERGOING ANALYSIS
CWE
CWE-79

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