What is CVE-2023-52951?

CVE-2023-52951 is a medium-severity vulnerability in Synology Note_station_client, classified under Cleartext Transmission of Sensitive Information. CVSS score: 5.9/10. Published 2026-06-03.

How severe is CVE-2023-52951?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Synology Note_station_client

CVE-2023-52951

A cleartext transmission of sensitive information vulnerability in Synology Note Station Client before 2.2.4-703 allows man-in-the-middle attackers to obtain user credential.

EPSS: 0.000 (5.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Synology Note_station_client
Synology Note Station Client

Weakness classification (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

References

security@synology.com (vendor-advisory, Release Notes)

Frequently asked questions

What is CVE-2023-52951?: CVE-2023-52951 is a medium-severity vulnerability in Synology Note_station_client, classified under Cleartext Transmission of Sensitive Information. CVSS score: 5.9/10. Published 2026-06-03.
How severe is CVE-2023-52951?: Medium severity. CVSS v3 base score is 5.9 out of 10.