#Security Vulnerability

Time-of-check time-of-use (toctou) race condition in NtQueryInformation Token function (ntifs.h) allows an authorized attacker to elevate privileges locally.

Improper validation of specified type of input in Windows Local Session Manager (LSM) allows an authorized attacker to deny service over a network.

Deserialization of untrusted data in Microsoft Windows Codecs Library allows an unauthorized attacker to execute code locally.

**What privileges could be gained by an attacker who successfully exploited this vulnerability?** An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

**What privileges could be gained by an attacker who successfully exploited this vulnerability?** An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

**What privileges could be gained by an attacker who successfully exploited the vulnerability?** An attacker who successfully exploited this vulnerability could gain specific limited SYSTEM privileges.

Improper authentication in Windows SMB Server allows an authorized attacker to perform tampering over a network.

**How could an attacker exploit this vulnerability?** To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system. Additionally, an attacker could convince a local user to open a malicious file. The attacker would have to convince the user to click a link, typically by way of an enticement in an email or instant message, and then convince them to open the specially crafted file.