How severe is CVE-2018-6537?

CVE-2018-6537 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-6537 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6537?

CVE-2018-6537 affects Flexense Syncbreeze. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-6537?

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

When was CVE-2018-6537 published?

CVE-2018-6537 was published on 2018-02-02 and last updated on 2026-06-17.

CVE-2018-6537

CVE-2018-6537 is a critical-severity vulnerability in Flexense Syncbreeze with a CVSS 3.x base score of 9.8. 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-119.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 4% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Flexense Syncbreeze
Published: 2018-02-02
Last modified: 2026-06-17

Description

A buffer overflow vulnerability in the control protocol of Flexense SyncBreeze Enterprise v10.4.18 allows remote attackers to execute arbitrary code by sending a crafted packet to TCP port 9121.

Frequently asked questions

What is CVE-2018-6537?: A buffer overflow vulnerability in the control protocol of Flexense SyncBreeze Enterprise v10.4.18 allows remote attackers to execute arbitrary code by sending a crafted packet to TCP port 9121.
How severe is CVE-2018-6537?: CVE-2018-6537 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-6537 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6537?: CVE-2018-6537 affects Flexense Syncbreeze. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-6537?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-6537 published?: CVE-2018-6537 was published on 2018-02-02 and last updated on 2026-06-17.

References

https://www.exploit-db.com/exploits/43936/

Affected products (1)

cpe:2.3:a:flexense:syncbreeze:10.4.18:*:*:*:enterprise:*:*:*

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