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CVE-2026-34227

8.8 · HIGH

Sliver is a command and control framework that uses a custom Wireguard netstack.

Published Mar 31, 2026CWE-306EPSS 0.47%

Overview

CVE-2026-34227 is a high-severity vulnerability. It was published on March 31, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Sliver is a command and control framework that uses a custom Wireguard netstack. Prior to version 1.7.4, a single click on a malicious link gives an unauthenticated attacker immediate, silent control over every active C2 session or beacon, capable of exfiltrating all collected target data (e.g. SSH keys, ntds.dit) or destroying the entire compromised infrastructure, entirely through the operator's own browser. This issue has been patched in version 1.7.4.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/BishopFox/sliver/security/advisories/GHSA-6fpf-248c-m7wmGitHubgithub.com/BishopFox/sliver/security/advisories/GHSA-6fpf-248c-m7wm

How CyberStrike helps

Frequently asked questions

What is CVE-2026-34227?

CVE-2026-34227 is a high-severity vulnerability. It was published on March 31, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-34227?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-34227?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-34227?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-34227 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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