How severe is CVE-2021-36756?

CVE-2021-36756 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-36756 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36756?

CVE-2021-36756 affects Northern.tech Cfengine. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-36756?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-36756 published?

CVE-2021-36756 was published on 2021-10-27 and last updated on 2026-06-17.

CVE-2021-36756

CVE-2021-36756 is a medium-severity vulnerability in Northern.tech Cfengine with a CVSS 3.x base score of 6.5. 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-295.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 6.4
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Northern.tech Cfengine
Published: 2021-10-27
Last modified: 2026-06-17

Description

CFEngine Enterprise 3.15.0 through 3.15.4 has Missing SSL Certificate Validation.

Frequently asked questions

What is CVE-2021-36756?: CFEngine Enterprise 3.15.0 through 3.15.4 has Missing SSL Certificate Validation.
How severe is CVE-2021-36756?: CVE-2021-36756 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-36756 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36756?: CVE-2021-36756 affects Northern.tech Cfengine. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-36756?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-36756 published?: CVE-2021-36756 was published on 2021-10-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:northern.tech:cfengine:*:*:*:*:*:*:*:*

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