CVE-2026-88157: OpenSSH for Windows heap-based buffer overflow

CVE-2026-88157 · Severity: high · CVSS 8.8 · Published 2026-10-13

OpenSSH for Windows is a secure remote access tool widely used in corporate environments. A heap-based buffer overflow vulnerability allows an attacker on the network to execute arbitrary code on affected systems without authentication, potentially giving an attacker complete control of the compromised computer.

Technologies: OpenSSH for Windows. Vendors: OpenSSH.

Quick answers

Is CVE-2026-88157 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-88157 being exploited in the wild.
How severe is CVE-2026-88157?
High severity, with a CVSS score of 8.8, published 13 October 2026.
Which products and versions are affected?
OpenSSH OpenSSH for Windows.
Is there a fix for CVE-2026-88157?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-88157 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-88157?
Check whether you run OpenSSH for Windows. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A heap-based buffer overflow exists in OpenSSH for Windows that can be triggered over the network without authentication. An attacker can send a specially crafted network packet to trigger the overflow and achieve remote code execution with the privileges of the OpenSSH process.

Affected products

  • OpenSSH OpenSSH for Windows

Timeline

  • 2026-10-13: disclosed

References

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