Critical severity · published Sep 18, 2026
CVE-2026-13684
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…
9.8
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DM
DiskStation Manager (DSM) · Synology
7.4 before 7.4-90075; 7.3.2 before 7.3.2-86009-4; 7.2.2 before 7.2.2-72806-9; 7.2.1 before 7.2.1-69057-12 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-13684
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-13684
www.synology.com
https://www.synology.com/en-global/security/advisory/Synology_SA_26_13
More from DiskStation Manager (DSM)
9.8
CVE-2026-13639
An insufficient entropy vulnerability in login logic 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…
9.8
CVE-2025-13392
Improper check for unusual or exceptional conditions vulnerability in SSO in Synology DiskStation Manager (DSM) before 7.2.2-72806-5 and 7.3.1-86003-1 (7.2.1-69057 is not…
9.8
CVE-2022-27624
A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the packet decryption functionality of Out-of-Band (OOB) Management
9.8
CVE-2022-27625
A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the message processing functionality of Out-of-Band (OOB) Management
9.1
CVE-2022-27623
Missing authentication for critical function vulnerability in iSCSI management functionality in Synology DiskStation Manager (DSM) before 7.1-42661 allows remote attackers to read…