EUVD-2026-82785
GHSA-j93c-qcgp-gv6m
Severity by source
AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Network-reachable User API (AV:N/AC:L) needs a low-priv account (PR:L) and interaction (UI:R); arbitrary file read/write plus reboot DoS give C:H/I:H/A:H, no scope change.
Primary rating from Vendor (synology).
CVSS VectorVendor: synology
Lifecycle Timeline
3DescriptionCVE.org
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.
Articles & Coverage 1
AnalysisAI
CRLF injection in the Synology DiskStation Manager (DSM) User API lets a remote, low-privileged authenticated user (PR:L) who can also induce limited user interaction (UI:R) read or write arbitrary files on the appliance and trigger a denial-of-service condition that surfaces only after the next reboot. Deployments running DSM before 7.2.1-69057-10, before 7.2.2-72806-7, or before 7.3.2-86009-2 are affected; there is no public exploit identified at time of analysis and the issue is not listed as confirmed actively exploited (CISA KEV). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires a valid but low-privileged authenticated DSM user account (PR:L) reaching the User API over the network, plus some user interaction (UI:R) to trigger the file operation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine mid-to-high priority for exposed Synology NAS devices, though not a drop-everything emergency. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the vendor-released patch by upgrading DSM to 7.2.1-69057-10 or later on the 7.2.1 line, 7.2.2-72806-7 or later on the 7.2.2 line, or 7.3.2-86009-2 or later on the 7.3.2 line, as documented in Synology advisory SA_26_06 (https://www.synology.com/en-global/security/advisory/Synology_SA_26_06). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Synology DSM instances and identify any running versions earlier than 7.2.1-69057-10, 7.2.2-72806-7, or 7.3.2-86009-2; restrict access to the DSM User API to trusted management networks, enforce least privilege and MFA for all DSM accounts, and enable logging for anomalous file access or API calls. …
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