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SoftEther VPN

INFRA · APIS
Velocity2.5

Multi-protocol VPN server and client software

www.softether.org ↗

SoftEther returns after 16 months with Windows ARM64 support and a pile of fixes.

vpnwindows-arm64post-quantummaintenanceopen-source
◆Current state
SoftEther 5.2.5189 is the first 5.x release since July 2025. It adds Windows ARM64 support with an ARM64 Neo6 driver, restores kernel-mode NAT, adds a configurable DHCP discover timeout and a Turkish translation, and fixes memory leaks, a dangling pointer and Linux password input. Builds can now disable the post-quantum OQS library added in 5.2.5188.
◆Where it's heading
The 5.x line moves slowly and in batches, with community contributors doing most of the work. After 5.2.5188 added hybrid post-quantum key exchange, this release is about platform reach and stability rather than new protocol features.
◆Prediction
The cadence suggests a long gap before the next tag; the entries give no sign of another protocol-level change soon.

◆Recent moves

  1. 9d ago

    5.2.5189 adds Windows ARM64 support and fixes kernel-mode NAT

    A large batch release ending a 16-month gap: Windows ARM64 support with an ARM64 Neo6 driver, a kernel-mode NAT fix, a DHCP timeout setting and many memory-safety fixes. It widens platform reach after 5.2.5188's post-quantum work.

    View source ↗
  2. 1y ago

    5.2.5188 adds X25519MLKEM768 post-quantum key exchange

    ⚡ SPARK

    The only release here with protocol impact: liboqs and oqs-provider submodule updates bring X25519MLKEM768 hybrid key exchange into the tunnel. The rest of the entry is the hygiene work that defines this window — CI runners, Linux artifact publishing, Docker build machinery moved in-tree.

    View source ↗
  3. 2y ago

    5.02.5187: version bump ahead of the 5187 release

    A release-pipeline version bump with no described user-facing change. Its only value is as a marker that the 5187 cut happened.

    View source ↗
  4. 2y ago

    5.02.5186 bumps webpack in the admin web UI

    A Dependabot webpack upgrade from 5.76.0 to 5.94.0 in the admin console assets. Supply-chain housekeeping, consistent with where most of this project's recent effort goes.

    View source ↗
  5. 2y ago

    5.02.5185 fixes DHCP handling and a UDP amplification report

    DHCP handling fixes plus a reported UDP traffic amplification issue, credited to an external reporter. Operationally meaningful for anyone running SoftEther internet-facing, but corrective work rather than new capability.

    View source ↗
  6. 2y ago

    5.02.5184: contributor credits, no release notes

    The entry carries only contributor acknowledgements; what shipped is not described anywhere in the changelog. Typical of how thin this feed's notes are outside the 5188 tag.

    View source ↗