CVE-2026-56168
MediumCVSS 6.5Exploitation Probability (EPSS)
Elevated risk52th percentile - higher than 52% of all known CVEs
Summary
A null pointer dereference in Windows SMB Server allows an authorized attacker to cause a denial of service over the network.
Risk Assessment
An attacker can disrupt SMB services, affecting file and printer availability on the network.
Recommendation
Install the latest Windows security updates from Microsoft.
Other vulnerabilities in Windows SMB Server
See all- CVE-2026-26128High
Improper authentication in Windows SMB Server allows an authorized attacker to elevate privileges locally.
- CVE-2026-62800High
Heap-based buffer overflow in Windows SMB Server allows an authorized attacker to execute code over a network.
- CVE-2026-62790High
Heap-based buffer overflow in Windows SMB Server allows an authorized attacker to execute code over a network.
- CVE-2026-57089High
Use-after-free vulnerability in Windows SMB Server Network Transport Driver (srvnet.sys) allows an unauthorized attacker to execute code over a network.
- CVE-2026-50360High
Incorrect implementation of the authentication algorithm in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
- CVE-2026-24294High
A vulnerability in Windows SMB Server due to improper authentication allows local privilege escalation. An authorized attacker can exploit this flaw to gain higher privileges on the system.
- CVE-2026-20934High
A race condition vulnerability in Windows SMB Server allows an authorized attacker to elevate privileges over a network. The issue stems from improper synchronization when accessing shared resources concurrently.
- CVE-2026-20927Medium
A race condition in Windows SMB Server allows an authenticated attacker to cause a denial of service over the network.
- CVE-2026-20926High
A race condition vulnerability in Windows SMB Server allows an authorized attacker to elevate privileges over a network. The issue stems from improper synchronization when accessing shared resources concurrently.
- CVE-2026-20921High
A race condition in Windows SMB Server allows for concurrent execution using shared resources with improper synchronization. This enables an authorized attacker to elevate privileges over a network.
Original NVD description (English source)
Null pointer dereference in Windows SMB Server allows an authorized attacker to deny service over a network.