High 8.7Published Dec 15, 2025

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

Updated under an hour ago (Oct 26, 2026, 2:00 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 8.7 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-400
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Apr 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Syncbreeze SyncBreeze syncbreeze:syncbreeze (from the name)	15.2.24	CNA record

References

References

https://www.exploit-db.com/exploits/51725	exploit
https://www.syncbreeze.com/	product
https://www.vulncheck.com/advisories/syncbreeze-denial-of-service-via-login-endpoint-overflow	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.