Is CVE-2023-52951 in the CISA KEV catalog?

No. CVE-2023-52951 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-52951?

CVE-2023-52951 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2023-52951?

CVE-2023-52951 has an EPSS score of 0.13% (3th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-52951?

Upgrade note station client to 2.2.4-703 or later.

CVE & CISA-KEV Catalog

CVE-2023-52951

MEDIUM

5.9

CVSS v3

NVD

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.

CWE-319

How to fix

Remediation Available

note station clientNVD

Affected:< 2.2.4-703Fixed in:2.2.4-703CVE-2023-52951derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.13%probability of exploitation in 30 days

3rdpercentile

Low risk: more likely to be exploited than 3% of all known CVEs.

References

Release Notes1

synology.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-05.