CVE-2020-36946
Published: 27 January 2026
Summary
CVE-2020-36946 is a high-severity Allocation of Resources Without Limits or Throttling (CWE-770) vulnerability in Flexense Syncbreeze. Its CVSS base score is 7.5 (High).
Operationally, ranked at the 44.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
This control implements explicit throttling on session allocation, addressing the weakness of allocating resources without limits.
Plan testing exercises resource allocation limits and throttling during simulated failures, directly addressing weaknesses that allow unbounded resource use.
Contingency plan updates ensure recovery strategies address unbounded resource allocation, making it harder for attackers to exploit lack of throttling to cause prolonged outages.
Provides continuity when unbounded resource allocation at the primary site leads to exhaustion and downtime.
Alternate services allow operations to continue when primary allocation of resources lacks limits or throttling.
Explicit planning of security-related actions requires defining limits, windows, and resource allocations, making allocation without throttling far less likely.
Measures of performance include tracking allocation behavior and throttling effectiveness, reducing the window for resource exhaustion attacks.
Imposes an inactivity-based limit on network resource allocation, throttling the number of concurrently held connections.
NVD Description
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.
Deeper analysisAI
CVE-2020-36946 is a denial of service vulnerability in SyncBreeze version 10.0.28, specifically affecting the login endpoint. Remote attackers can exploit it by sending an oversized payload in the login request, which overwhelms the application and causes the service to crash, disrupting availability. The issue is classified under CWE-770 (Allocation of Resources Without Limits or Throttling) and carries a CVSS v3.1 base score of 7.5 (High).
The vulnerability is exploitable over the network (AV:N) with low attack complexity (AC:L), requiring no privileges (PR:N), no user interaction (UI:N), and no scope change (S:U), resulting in high impact to availability (A:H) with no impact to confidentiality or integrity (C:N/I:N). Any remote attacker can trigger the crash without authentication, potentially denying service to legitimate users relying on the SyncBreeze service.
Advisories and related resources, including those from VulnCheck at https://www.vulncheck.com/advisories/syncbreeze-login-denial-of-service and the vendor site at http://www.syncbreeze.com, provide further details on the issue. Proof-of-concept exploits are available on Exploit-DB at https://www.exploit-db.com/exploits/49291.
Details
- CWE(s)