#vulnerability

**How could an attacker exploit this vulnerability?** To successfully exploit this vulnerability, an attacker would need to use a malicious SMB client to mount an attack against the SMB server. This exploit is only applicable to SMB over QUIC.

**What kind of security feature could be bypassed by successfully exploiting this vulnerability?** An attacker who successfully exploits this vulnerability could bypass Windows Defender Application Control (WDAC) enforcement. This could lead to the ability to run unauthorized applications on target systems.

**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 this vulnerability?** An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

**According to the CVSS metric, successful exploitation of this vulnerability could lead to total loss of confidentiality (C:H)? What does that mean for this vulnerability?** This vulnerability discloses a user's NTLMv2 hash to the attacker who could use this to authenticate as the user.

**According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?** The attacker must inject themselves into the logical network path between the target and the resource requested by the victim to read or modify network communications. This is called a machine-in-the-middle (MITM) attack.

**According to the CVSS metric, the attack vector is physical (AV:P). What does that mean for this vulnerability?** To exploit this vulnerability, an unauthenticated attacker needs to physically connect a malicious USB device to the victim's machine.

**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.

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

**Why is this advisory published to the Security Updates Guide Vulnerabilities tab instead of the Advisories tab?** We are publishing this advisory to the Security Update Guide's Vulnerabilities tab to document the related defense in depth security updates in the Deployments tab. Generally advisories do not contain security updates. However Microsoft Engineering elected to provide them to ensure customers could ensure they are protected. Please reference the Security Updates table or the Deployments tab to find the security update for related to your product.