CVE-2020-36946

SyncBreeze 10.0.28 - 'login' Denial of Service

SyncBreeze 10.0.28 contains a denial of service vulnerability in the login endpoint that allows remote attackers to crash the service. Attackers can send an oversized payload in the login request to overwhelm the application and potentially disrupt service availability.

Affected

Flexense Ltd. · SyncBreeze

CVSS v4.0 VULNCHECK

8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULNCHECK

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.73% chance of exploitation in the next 30 days, 53rd percentile

Published

2026-01-27

Updated

2026-04-07

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/49291

Security advisories

• https://www.vulncheck.com/advisories/syncbreeze-login-denial-of-service
• http://www.syncbreeze.com

References

• CVE Record
• NVD entry