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High severity · published Sep 18, 2026
CVE-2026-40530
An improper neutralization of CRLF sequences ('CRLF injection') vulnerability in User API in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-72806-7 and…
8.0
CVSS
0.5%
EPSS
No
On KEV
Description
An improper neutralization of CRLF sequences ('CRLF injection') vulnerability in User 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 authenticated users to read or write arbitrary files and conduct denial-of-service attacks after the system is rebooted.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% 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
Affected product
DM
DiskStation Manager (DSM)
Synology
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-40530
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-40530
www.synology.com
https://www.synology.com/en-global/security/advisory/Synology_SA_26_06
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