Quick answers
- Is CVE-2026-83871 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-83871 being exploited in the wild.
- How severe is CVE-2026-83871?
- High severity, with a CVSS score of 7, published 13 October 2026.
- Which products and versions are affected?
- OpenSSH OpenSSH for Windows.
- Is there a fix for CVE-2026-83871?
- 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-2026-83871 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-83871?
- 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 vulnerability exists in OpenSSH for Windows that can be triggered by an authorized local attacker to achieve privilege escalation. The vulnerability requires prior authentication or local access to the system. Successful exploitation grants the attacker elevated privileges on the affected Windows system.
Affected products
- OpenSSH OpenSSH for Windows
Timeline
- 2026-10-13: disclosed