How severe is CVE-2020-36946?

CVE-2020-36946 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-36946 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-36946?

CVE-2020-36946 affects Flexense Syncbreeze. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-36946?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2020-36946 have an EU (EUVD) identifier?

Yes. CVE-2020-36946 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-30861.

When was CVE-2020-36946 published?

CVE-2020-36946 was published on 2026-01-27 and last updated on 2026-06-17.

CVE-2020-36946

CVE-2020-36946 is a high-severity vulnerability in Flexense Syncbreeze with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2020-30861
Weakness: CWE-770
Affected product: Flexense Syncbreeze
Published: 2026-01-27
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2020-36946?: 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.
How severe is CVE-2020-36946?: CVE-2020-36946 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-36946 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-36946?: CVE-2020-36946 affects Flexense Syncbreeze. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-36946?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2020-36946 have an EU (EUVD) identifier?: Yes. CVE-2020-36946 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-30861.
When was CVE-2020-36946 published?: CVE-2020-36946 was published on 2026-01-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:flexense:syncbreeze:10.0.28:*:*:*:enterprise:*:*:*

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CVE-2018-6537 — Critical (CVSS 9.8): A buffer overflow vulnerability in the control protocol of Flexense SyncBreeze Enterprise v10.4.18 allows remote…
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