Medium severity · published Jun 3, 2026
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
5.9
CVSS
0.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SN
Synology Note Station Client · Synology
before 2.2.4-703 · source: vendor
NS
Note Station Client · Synology
before 2.2.4-703 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-52951
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-52951
Release Notes
https://www.synology.com/en-global/releaseNote/NoteStationClient
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