Quick answers
- Is CVE-2026-70575 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-70575 being exploited in the wild.
- How severe is CVE-2026-70575?
- Medium severity, with a CVSS score of 5.3, published 8 September 2026.
- Which products and versions are affected?
- Microsoft Windows (Schannel) <UNKNOWN>.
- Is there a fix for CVE-2026-70575?
- 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-2026-70575 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-70575?
- Check whether you run Microsoft Windows (Schannel) at an affected version. 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 null pointer dereference vulnerability exists in Windows Schannel's handling of TLS/SSL protocol operations. An authorized attacker can trigger this vulnerability over the network by sending specially crafted requests to a system running the affected Schannel implementation. Exploitation results in a crash of the Schannel service, causing denial of service to applications that depend on it for secure communications. The vulnerability requires network connectivity and authorization, but does not allow code execution or data theft. Microsoft has released security patches to address this issue.
Affected products
- Microsoft Windows (Schannel) <UNKNOWN>
Timeline
- 2026-09-08: disclosed