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-2026-96325High
A missing reference to an active allocated resource in Windows SMB Server allows an unauthorized attacker to deny service over a network. The flaw lies in how the SMB service manages resources.
- CVE-2026-88127High
Use after free in Windows SMB Server allows an authorized attacker to elevate privileges locally.
- CVE-2026-26128High
Improper authentication in Windows SMB Server allows an authorized attacker to elevate privileges locally.
- CVE-2019-0703MediumActively exploited
An information disclosure vulnerability exists in the way that the Windows SMB Server handles certain requests, aka 'Windows SMB Information Disclosure Vulnerability'. This CVE ID is unique from CVE-2019-0704 and CVE-2019-0821.
- CVE-2026-72949High
Null pointer dereference in Windows SMB Server Network Transport Driver (srvnet.sys) allows an unauthorized attacker to deny service over a network.
- CVE-2026-69403Medium
A missing authorization vulnerability in Windows SMB Server allows an authorized attacker to disclose information locally.
- CVE-2026-69374Medium
The vulnerability in Windows SMB Server is an allocation of resources without limits or throttling. It allows an authorized attacker to deny service over a network.
- 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.
Original NVD description (English source)
Null pointer dereference in Windows SMB Server allows an authorized attacker to deny service over a network.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS