Quick answers
- Is CVE-2026-69503 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-69503 being exploited in the wild.
- How severe is CVE-2026-69503?
- High severity, with a CVSS score of 8, published 8 September 2026.
- Which products and versions are affected?
- Microsoft Windows USB Driver.
- Is there a fix for CVE-2026-69503?
- 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-2026-69503 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-69503?
- Check whether you run Microsoft Windows USB Driver. 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 exists in the Windows USB Driver, exploitable by an authorized attacker over the network. The vulnerability allows an attacker with valid authentication to trigger the overflow condition by sending specially crafted network traffic, bypassing normal access controls to achieve privilege escalation. An attacker who successfully exploits this flaw can execute arbitrary code with system-level privileges. Microsoft has issued a security update to remediate this issue.
Affected products
- Microsoft Windows USB Driver
Timeline
- 2026-09-08: disclosed