CVE-2026-39312
7.5 · HIGHOverview
CVE-2026-39312 is a high-severity vulnerability affecting softether softethervpn. It was published on April 7, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
SoftEtherVPN is a an open-source cross-platform multi-protocol VPN Program. In 5.2.5188 and earlier, a pre-authentication denial-of-service vulnerability exists in SoftEther VPN Developer Edition 5.2.5188 (and likely earlier versions of Developer Edition). An unauthenticated remote attacker can crash the vpnserver process by sending a single malformed EAP-TLS packet over raw L2TP (UDP/1701), terminating all active VPN sessions.
Remediation
Check the references section for vendor advisories and patches from softether. Update softethervpn 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 |
|---|---|---|---|
| softether | softethervpn | 0 | Affected |
Frequently Asked Questions
What is CVE-2026-39312?
CVE-2026-39312 is a high-severity vulnerability affecting softether softethervpn. It was published on April 7, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2026-39312?
This vulnerability has a CVSS 3.1 base score of 7.5, 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-2026-39312?
Check the references section for vendor advisories and patches from softether. Update softethervpn 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-2026-39312?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-39312 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.
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