Medium severity · published Sep 18, 2026
CVE-2026-40535
An improper limitation of a pathname to a restricted directory ('path traversal') vulnerability in Desktop API in Synology DiskStation Manager (DSM) before 7.2.1-69057-10,…
6.5
CVSS
0.5%
EPSS
No
On KEV
Description
An improper limitation of a pathname to a restricted directory ('path traversal') vulnerability in Desktop 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 attackers to write limited files and conduct limited denial-of-service attacks.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DM
DiskStation Manager (DSM) · Synology
7.3 before 7.3.2-86009-2; 7.2.2 before 7.2.2-72806-7; 7.2.1 before 7.2.1-69057-10 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-40535
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-40535
www.synology.com
https://www.synology.com/en-global/security/advisory/Synology_SA_26_06
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