Quick answers
- Is CVE-2026-44815 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-44815 being exploited in the wild.
- How severe is CVE-2026-44815?
- Critical severity, with a CVSS score of 9.8, published 9 June 2026.
- Which products and versions are affected?
- Microsoft Windows.
- Is there a fix for CVE-2026-44815?
- 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-2026-44815 attacked?
- It is attacked over the network, in an operating system.
- Am I affected by CVE-2026-44815?
- Check whether anything you run is named in the advisory. 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 stack-based buffer overflow (CWE-121) exists in the Microsoft Windows DHCP Client. The vulnerability is triggered when the client processes specially crafted DHCP responses sent over the network. An unauthenticated attacker on the same network segment (or potentially via a DHCP relay) can exploit this to achieve remote code execution (RCE) with high privileges. No user interaction or prior authentication is required for a successful attack. Microsoft has released security updates to address this issue; administrators should apply these patches immediately to mitigate the risk of full system compromise.
Affected products
- Microsoft Windows
Timeline
- 2026-06-09: disclosed
- 2026-06-09: advisory