CVE-2021-31822

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-11-24 · updated 2026-06-17
Weakness: CWE-276

Description

When Octopus Tentacle is installed on a Linux operating system, the systemd service file permissions are misconfigured. This could lead to a local unprivileged user modifying the contents of the systemd service file to gain privileged access.

Affected products

Octopus Deploy Octopus Tentacle: from 3.15.4 before 6.1.1116 — fixed in 6.1.1116

How to fix

Upgrade to a fixed version: Octopus Deploy Octopus Tentacle 6.1.1116. Check the vendor advisory for mitigations.

References

https://advisories.octopus.com/adv/2021-11---Local-privilege-escalation-in-Octopus-Tentacle-%28CVE-2021-31822%29.2283732993.html
https://advisories.octopus.com/adv/2021-11---Local-privilege-escalation-in-Octopus-Tentacle-%28CVE-2021-31822%29.2283732993.html

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