CVE-2026-56186
HighCVSS 8.1Exploitation Probability (EPSS)
Elevated risk62th percentile - higher than 62% of all known CVEs
Summary
Out-of-bounds read in Windows Schannel allows an authorized attacker to disclose information over a network.
Risk Assessment
An authorized attacker could leak sensitive data processed by Schannel, such as encryption keys or session data.
Recommendation
Apply the latest security updates for Windows Schannel.
Other vulnerabilities in Windows Schannel
See all- CVE-2026-85818Critical
Improper verification of cryptographic signature in Windows Schannel allows an unauthorized attacker to perform spoofing over a network.
- CVE-2026-105008Critical
No cwe for this issue in Windows Schannel allows an unauthorized attacker to perform spoofing over a network.
- CVE-2026-72940High
Heap-based buffer overflow in Windows Schannel allows an unauthorized attacker to execute code over a network.
- CVE-2026-70575Medium
Null pointer dereference in Windows Schannel allows an authorized attacker to cause a denial of service over a network.
- CVE-2026-62779High
Use after free in Windows Schannel allows an authorized attacker to elevate privileges locally.
- CVE-2026-62757Medium
Improper verification of cryptographic signature in Windows Schannel allows an unauthorized attacker to bypass a security feature over a network.
Original NVD description (English source)
Out-of-bounds read in Windows Schannel allows an authorized attacker to disclose information over a network.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS