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CVE-2026-20926: Windows SMB Server Elevation of Privilege Vulnerability

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.

Microsoft Security Response Center
#vulnerability#windows#samba#auth#Windows SMB Server#Security Vulnerability
CVE-2026-20925: NTLM Hash Disclosure Spoofing Vulnerability

External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.

CVE-2026-20934: Windows SMB Server Elevation of Privilege Vulnerability

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.

CVE-2026-20932: Windows File Explorer Information Disclosure Vulnerability

Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.

CVE-2026-20924: Windows Management Services Elevation of Privilege Vulnerability

**According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?** Successful exploitation of this vulnerability requires an attacker to win a race condition.

CVE-2026-20922: Windows NTFS Remote Code Execution Vulnerability

**According to the CVSS metric, the attack vector is local (AV:L). Why does the CVE title indicate that this is a remote code execution?** The word **Remote** in the title refers to the location of the attacker. This type of exploit is sometimes referred to as Arbitrary Code Execution (ACE). The attack itself is carried out locally. This means an attacker or victim needs to execute code from the local machine to exploit the vulnerability.

CVE-2026-20918: Windows Management Services Elevation of Privilege Vulnerability

**According to the CVSS metric, successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability?** In this case, a successful attack could be performed from a low privilege AppContainer. The attacker could elevate their privileges and execute code or access resources at a higher integrity level than that of the AppContainer execution environment.