CVE-2023-5748

MEDIUM

5.5

CVSS Score

Published: October 24, 2023 at 10:26 AM UTC

Updated: June 17, 2026 at 06:49 AM UTC

1 product affected across 1 vendorSSL VPN Client

Using Synology SSL VPN Client by Synology?

Get instant alerts when new vulnerabilities affect Synology SSL VPN Client - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

Buffer copy without checking size of input ('Classic Buffer Overflow') vulnerability in cgi component in Synology SSL VPN Client before 1.4.7-0687 allows local users to conduct denial-of-service attacks via unspecified vectors.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

SSL VPN Client · Synology

95%

v < 1.4.7-0687

Affected range stops below 1.4.7-0687, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://www.synology.com/en-global/security/advisory/Synology_SA_23_12

References (1)

Vendor Advisory

Source: [email protected]

https://www.synology.com/en-global/security/advisory/Synology_SA_23_12

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUM[email protected]

Attack Vector: LOCAL
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-120

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card