CVE-2021-28123

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-04-02 · updated 2026-06-17
Weakness: CWE-1188

Description

Undocumented Default Cryptographic Key Vulnerability in Cohesity DataPlatform version 6.3 prior 6.3.1g, 6.4 up to 6.4.1c and 6.5.1 through 6.5.1b. The ssh key can provide an attacker access to the linux system in the affected version.

Affected products

Cohesity Dataplatform: from 6.3 before 6.3.1g; from 6.4 before 6.4.1c; from 6.5.1 before 6.5.1b — fixed in 6.3.1g, 6.4.1c, 6.5.1b

How to fix

Upgrade to a fixed version: Cohesity Dataplatform 6.3.1g, 6.4.1c, 6.5.1b. Check the vendor advisory for mitigations.

References

https://github.com/cohesity/SecAdvisory/blob/master/CVE-2021-28123.md
https://github.com/cohesity/SecAdvisory/blob/master/CVE-2021-28123.md

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