cve 2026 56186

CVE-2026-56186 covers Microsoft’s Windows Schannel information disclosure vulnerability addressed by July 14, 2026, security updates. The flaw is an out-of-bounds read in the Windows TLS/SSL implementation and carries a High severity rating of 8.1. It may let an authorized attacker disclose information over a network, although it is not currently reported as exploited in the wild. This tag archive focuses on the corrective cumulative updates for supported Windows releases, along with administrator guidance to deploy the appropriate package and verify that affected devices reach the corrected build. It provides a concise reference for understanding the vulnerability’s Schannel context, its network-based exposure, and the recommended update response.