How severe is CVE-2021-28124?

CVE-2021-28124 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-28124 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28124?

CVE-2021-28124 affects Cohesity Cohesity Dataplatform. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28124?

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

When was CVE-2021-28124 published?

CVE-2021-28124 was published on 2021-04-02 and last updated on 2026-06-17.

CVE-2021-28124

CVE-2021-28124 is a medium-severity vulnerability in Cohesity Cohesity Dataplatform with a CVSS 3.x base score of 5.9. 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-306.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Cohesity Cohesity Dataplatform
Published: 2021-04-02
Last modified: 2026-06-17

Description

A man-in-the-middle vulnerability in Cohesity DataPlatform support channel in version 6.3 up to 6.3.1g, 6.4 up to 6.4.1c and 6.5.1 through 6.5.1b. Missing server authentication in impacted versions can allow an attacker to Man-in-the-middle (MITM) support channel UI session to Cohesity DataPlatform cluster.

Frequently asked questions

What is CVE-2021-28124?: A man-in-the-middle vulnerability in Cohesity DataPlatform support channel in version 6.3 up to 6.3.1g, 6.4 up to 6.4.1c and 6.5.1 through 6.5.1b. Missing server authentication in impacted versions can allow an attacker to Man-in-the-middle (MITM) support channel UI session to Cohesity DataPlatform cluster.
How severe is CVE-2021-28124?: CVE-2021-28124 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-28124 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28124?: CVE-2021-28124 affects Cohesity Cohesity Dataplatform. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28124?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-28124 published?: CVE-2021-28124 was published on 2021-04-02 and last updated on 2026-06-17.

References

https://github.com/cohesity/SecAdvisory/blob/master/CVE-2021-28124.md

Affected products (1)

cpe:2.3:a:cohesity:cohesity_dataplatform:*:*:*:*:*:*:*:*

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