Quick answers
- Is CVE-2026-105558 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-105558 being exploited in the wild.
- How severe is CVE-2026-105558?
- High severity, with a CVSS score of 7.5, published 10 November 2026.
- Which products and versions are affected?
- Microsoft Windows Deployment Services.
- Is there a fix for CVE-2026-105558?
- 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-2026-105558 attacked?
- It is attacked over the network, in an operating system.
- Am I affected by CVE-2026-105558?
- Check whether you run Microsoft Windows Deployment Services. 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 Windows Deployment Services that allows network-based code execution. The vulnerability requires an attacker to be authorized/authenticated to access the service and communicate over the network; no user interaction is needed. Successful exploitation grants code execution on the target system.
Affected products
- Microsoft Windows Deployment Services
Timeline
- 2026-11-10: disclosed