Security readout for executives and security teams
Plain-English summary
CVE-2023-52951 affects Synology Note Station Client versions before 2.2.4-703. The client may transmit sensitive information in cleartext, allowing a network man-in-the-middle attacker to obtain user credentials. This is mainly a credential confidentiality risk, especially on untrusted or monitored networks.
Executive priority
Treat as a targeted credential exposure issue. Prioritize updating affected clients, especially for users connecting remotely or over public networks. No public active exploitation evidence is provided in the sources.
Technical view
The vulnerability is CWE-319 cleartext transmission of sensitive information in Synology Note Station Client before 2.2.4-703. CVSS 3.1 is 5.9 with network attack vector, high attack complexity, no privileges or user interaction, and high confidentiality impact only.
Likely exposure
Organizations are exposed if they have Synology Note Station Client installations older than 2.2.4-703. Risk is higher where clients connect over untrusted networks or paths where traffic interception is plausible.
Exploitation context
The CVE describes man-in-the-middle credential theft. The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Attack complexity is rated high, suggesting practical exploitation requires specific network positioning or conditions.
Researcher notes
Public details are limited to the CVE description, CVSS vector, CWE-319 classification, and Synology release note reference. Do not assume broader Synology product impact beyond Note Station Client before 2.2.4-703 without vendor confirmation.
Mitigation direction
- Upgrade Synology Note Station Client to 2.2.4-703 or later.
- Review Synology’s release notes and advisory guidance for deployment details.
- Avoid using affected clients on untrusted networks until updated.
- Consider rotating credentials if use on intercepted networks is suspected.
Validation and detection
- Inventory Synology Note Station Client installations and versions.
- Confirm all clients are at version 2.2.4-703 or later.
- Review network security logs for suspicious interception indicators where available.
- Check Synology release notes for any additional vendor instructions.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-319: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2023-52951 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N2.23.6synologyVulnerability scoring details
Base CVSS 3.1 score
5.9MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- Release noteCVE reference, synology · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.