CVE-2026-56194
HighCVSS 8.8Exploitation Probability (EPSS)
Elevated risk54th percentile - higher than 54% of all known CVEs
Summary
Heap-based buffer overflow vulnerability in Windows Network File System allows an authorized attacker to elevate privileges over a network.
Risk Assessment
Risk of privilege escalation by an authorized network user, potentially leading to unauthorized file and system access.
Recommendation
Install the latest Windows security updates from Microsoft.
Other vulnerabilities in Windows Network File System
See all- CVE-2026-68819Medium
Buffer over-read in Windows Network File System allows an unauthorized attacker to deny service over a network.
- CVE-2026-56650High
Heap-based buffer overflow in Windows Network File System allows an authorized attacker to elevate privileges locally.
- CVE-2026-56649Medium
A race condition exists in Windows Network File System when using a shared resource concurrently. An unauthorized attacker can exploit this to execute code remotely over the network.
- CVE-2026-56648High
A time-of-check time-of-use (TOCTOU) race condition in Windows Network File System allows an authorized attacker to elevate privileges over a network.
Original NVD description (English source)
Heap-based buffer overflow in Windows Network File System allows an authorized attacker to elevate privileges over a network.