CVE-2026-13684DiskStation Manager (DSM) Vulnerability
An improper encoding or escaping of output vulnerability in SCGI in Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 and 7.4-90075 allows remote attackers to read or write arbitrary files and conduct denial-of-service attacks.
Published Sep 18, 2026 · Updated Sep 18, 2026 · Also known as EUVD-2026-82772, GHSA-f4qf-hcj6-jwp9
Key Facts
Patch immediately- CVE-2026-13684 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting DiskStation Manager (DSM).
- It is exploited in the wild, listed in Industry KEV feed since Oct 29, 2026. No public exploit code is known.
- EPSS estimates a 0.6% probability of exploitation in the next 30 days.
- Fixed versions are available, including DiskStation Manager (DSM) 7.2.1-69057-12, DiskStation Manager (DSM) 7.2.2-72806-9, DiskStation Manager (DSM) 7.3.2-86009-4.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
0.6%
Exploit maturity
Exploited (KEV)
ATLAS score
56/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Oct 29, 2026
41 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
2
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Advisories And Exploit References
Description
An improper encoding or escaping of output vulnerability in SCGI in Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 and 7.4-90075 allows remote attackers to read or write arbitrary files and conduct denial-of-service attacks.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Oct 29, 2026 | n/a | Not reported |
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| DiskStation Manager (DSM) | >= 7.4 | 7.4-90075 |
Patched Releases
DiskStation Manager (DSM)
7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, 7.4-90075
Timeline
Publicly disclosed
Sep 18, 2026
Added to Industry KEV feed
Oct 29, 2026
Weakness Type
- CWE-116 Improper Encoding or Escaping of Output
References
- advisorysynology.com · Synology_SA_26_06
- advisoryUSOM advisory
- exploitVulnCheck exploitation report
- otherSynology-SA-26:13 DSM
FAQ
Common Questions.
An improper encoding or escaping of output vulnerability in SCGI in Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 and 7.4-90075 allows remote attackers to read or write arbitrary files and conduct denial-of-service attacks.
Affected: DiskStation Manager (DSM) versions >= 7.4. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Oct 29, 2026.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including DiskStation Manager (DSM) 7.2.1-69057-12, DiskStation Manager (DSM) 7.2.2-72806-9, DiskStation Manager (DSM) 7.3.2-86009-4.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2026-13684 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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