CVE-2026-72940
HighCVSS 8.8Exploitation Probability (EPSS)
Elevated risk54th percentile - higher than 54% of all known CVEs
Summary
Heap-based buffer overflow in Windows Schannel allows an unauthorized attacker to execute code over a network.
Risk Assessment
An unauthorized attacker can remotely execute arbitrary code, potentially leading to system compromise and breach of TLS communication security.
Recommendation
Install Windows security updates and monitor network traffic for suspicious TLS connections.
Other vulnerabilities in Windows Schannel
See all- 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.
- CVE-2026-56186High
Out-of-bounds read in Windows Schannel allows an authorized attacker to disclose information over a network.
Original NVD description (English source)
Heap-based buffer overflow in Windows Schannel allows an unauthorized attacker to execute code over a network.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS