CVE-2026-86343 · Infrastructure
NO FIX YET · SEE WHAT TO DO
DiskStation Manager's SNMP API does not neutralize CRLF sequences in input, so an authenticated administrator can inject line breaks and misuse the API. An attacker with admin rights can read or write arbitrary files and cause denial of service.
first public Nov 12, 2026 · 1 source
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Systems running Synology DiskStation Manager versions before the fixed builds, where SNMP is part of the setup. The attacker must already hold administrator credentials on the NAS, so exposure is limited to environments where admin access is shared or compromised. Systems on patched DSM builds or with no admin accounts exposed can skip it.
Not affected if no-admin-exposure, patched-dsm
Who cares dsm, nas, snmp, synology
7.3.2-86009-5 is affected; move to 7.3.2-86009-5 or later on the 7.3 branch.7.4.1-90080-1 is affected; move to 7.4.1-90080-1 or later on the 7.4 branch.An improper neutralization of CRLF sequences vulnerability in the SNMP API in Synology DiskStation Manager (DSM) before 7.3.2-86009-5 and 7.4.1-90080-1 allows remote authenticated users with administrator privileges to read or write arbitrary files and conduct denial-of-service attacks.
This page as .md · .json · CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
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