Microsoft Security Response Center

Improper link resolution before file access ('link following') in Host Process for Windows Tasks allows an authorized attacker to elevate privileges locally.

Out-of-bounds read in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

Use after free in Microsoft Office 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.

**According to the CVSS metrics, successful exploitation of this vulnerability could lead to a high loss of confidentiality (C:H), no effect on integrity (I:N) and some loss of availability (A:L). What does that mean for this vulnerability?** An attacker who successfully exploited this use after free vulnerability could view sensitive, previously freed memory heap information (Confidentiality) since the impacted component might be divulged to the attacker. While the attacker cannot make changes to disclosed information (Integrity), they might be able to force a crash within the function (Availability).

**What privileges could be gained by an attacker who successfully exploited this vulnerability?** An attacker who successfully exploited this vulnerability could elevate from a low integrity level up to a medium integrity level.

**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.

Improper access control in Customer Experience Improvement Program (CEIP) allows an authorized attacker to elevate privileges locally.

External control of file name or path in Windows WLAN Service allows an authorized attacker to elevate privileges locally.