CVE-2021-31439
8.8 · HIGHOverview
CVE-2021-31439 is a high-severity vulnerability affecting synology diskstation_manager. It was published on May 21, 2021 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 requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Synology DiskStation Manager. Authentication is not required to exploit this vulnerablity. The specific flaw exists within the processing of DSI structures in Netatalk. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-12326.
Remediation
Check the references section for vendor advisories and patches from synology. Update diskstation_manager to the latest patched version. 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.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| synology | diskstation_manager | >= 6.2, < 6.2.3-25426-3 | Affected |
| netatalk | netatalk | >= 0, < 3.1.13 | Affected |
References
Frequently Asked Questions
What is CVE-2021-31439?
CVE-2021-31439 is a high-severity vulnerability affecting synology diskstation_manager. It was published on May 21, 2021 and has a CVSS 3.1 base score of 8.8 (HIGH).
How severe is CVE-2021-31439?
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-31439?
Check the references section for vendor advisories and patches from synology. Update diskstation_manager to the latest patched version. 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-2021-31439?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-31439 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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