CVE-2026-18633 PUBLISHED

Assigner: synology
Reserved: 03.08.2026 Published: 12.11.2026 Updated: 12.11.2026

An access of uninitialized pointer vulnerability in the nfsd in Synology DiskStation Manager (DSM) before 7.3.2-86009-5 and 7.4.1-90080-1 allows remote attackers to conduct denial-of-service attacks.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 7.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Synology
Product	DiskStation Manager (DSM)
Versions	Default: affected affected from 7.4.1 to 7.4.1-90080-1 (excl.) affected from 7.3.2 to 7.3.2-86009-5 (excl.) unknown from 0 to 7.3.2 (excl.)

Credits

Pumpkin (@u1f383) from DEVCORE Research Team finder

References

Synology-SA-26:18 DSM

Problem Types

Access of Uninitialized Pointer CWE