CVE-2023-53873 HIGH

CVE-2023-53873: SyncBreeze 15.2.24 Denial of Service via Login Endpoint Overflow

Vendor Syncbreeze
Product SyncBreeze
Weakness CWE-400
Published December 15, 2025
Last update April 7, 2026
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

SyncBreeze 15.2.24 contains a denial of service vulnerability in the login authentication mechanism that allows attackers to crash the service. Attackers can send an oversized password parameter with repeated 'password=' values to overwhelm the login endpoint and potentially disrupt service availability.

Key dates

02Disclosure timeline

December 15, 2025 CVE published
April 7, 2026 Record updated