Denial of Service Vulnerability in SyncBreeze by SyncBreeze Technologies
CVE-2020-36946

8.7HIGH

Key Information:

Vendor

FleXen Projectse Ltd.

Status
Syncbreeze
Vendor
CVE Published:
27 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2020-36946?

SyncBreeze version 10.0.28 is susceptible to a denial of service vulnerability located in its login endpoint. This flaw enables remote attackers to send oversized payloads within login requests, which can subsequently overwhelm the application and lead to service crashes. As a result, availability of the service is significantly affected, making it imperative for users to apply necessary patches or upgrades.

Affected Version(s)

SyncBreeze 10.0.28

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2020-36946 - Proof of Concept

References

https://www.exploit-db.com/exploits/49291
exploit
http://www.syncbreeze.com
product
https://www.vulncheck.com/advisories/syncbreeze-login-den...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ahmed Elkhressy
.