CVE-2021-3578
7.8 · HIGHOverview
CVE-2021-3578 is a high-severity vulnerability affecting isync_project isync. It was published on February 16, 2022 and has a CVSS 3.1 base score of 7.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
A flaw was found in mbsync before v1.3.6 and v1.4.2, where an unchecked pointer cast allows a malicious or compromised server to write an arbitrary integer value past the end of a heap-allocated structure by issuing an unexpected APPENDUID response. This could be plausibly exploited for remote code execution on the client.
Remediation
Check the references section for vendor advisories and patches from isync_project. Update isync 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 |
|---|---|---|---|
| isync_project | isync | >= 0, < 1.3.6 | Affected |
References
Frequently Asked Questions
What is CVE-2021-3578?
CVE-2021-3578 is a high-severity vulnerability affecting isync_project isync. It was published on February 16, 2022 and has a CVSS 3.1 base score of 7.8 (HIGH).
How severe is CVE-2021-3578?
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-3578?
Check the references section for vendor advisories and patches from isync_project. Update isync 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-2021-3578?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-3578 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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Browser-based exploitation validates findings with real proof-of-concept.
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