How severe is CVE-2021-21270?

CVE-2021-21270 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-21270 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21270?

CVE-2021-21270 affects Octopus Octopusdsc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21270?

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

When was CVE-2021-21270 published?

CVE-2021-21270 was published on 2021-01-22 and last updated on 2026-06-17.

CVE-2021-21270

CVE-2021-21270 is a medium-severity vulnerability in Octopus Octopusdsc with a CVSS 3.x base score of 6.2. 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-319.

Key facts

Severity: Medium (CVSS 3.x base score 6.2)
CVSS v2: 2.1
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-319
Affected product: Octopus Octopusdsc
Published: 2021-01-22
Last modified: 2026-06-17

Description

OctopusDSC is a PowerShell module with DSC resources that can be used to install and configure an Octopus Deploy Server and Tentacle agent. In OctopusDSC version 4.0.977 and earlier a customer API key used to connect to Octopus Server is exposed via logging in plaintext. This vulnerability is patched in version 4.0.1002.

Frequently asked questions

What is CVE-2021-21270?: OctopusDSC is a PowerShell module with DSC resources that can be used to install and configure an Octopus Deploy Server and Tentacle agent. In OctopusDSC version 4.0.977 and earlier a customer API key used to connect to Octopus Server is exposed via logging in plaintext. This vulnerability is patched in version 4.0.1002.
How severe is CVE-2021-21270?: CVE-2021-21270 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-21270 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21270?: CVE-2021-21270 affects Octopus Octopusdsc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21270?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21270 published?: CVE-2021-21270 was published on 2021-01-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:octopus:octopusdsc:*:*:*:*:*:*:*:*

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