Microsoft Security Response Center

**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.

**What privileges could be gained by an attacker who successfully exploited the vulnerability?** With successful exploitation of this vulnerability, an attacker could gain elevated privileges equivalent to a system managed administrator, allowing them to execute arbitrary code with high integrity and bypass administrator protections.

Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to execute code over a network.

Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code over a network.

Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

Heap-based buffer overflow in Windows OLE allows an unauthorized attacker to execute code locally.

Improper privilege management in Microsoft Streaming Service allows an authorized attacker to elevate privileges locally.

**How could an attacker exploit this vulnerability?** An attacker with access to any user account assigned the built-in CMPivot Administrator security role could exploit this vulnerability by escalating privileges. Specifically, they could assign themselves—or another account—the Full Administrator role (or any other elevated role), or modify existing role permissions. This would allow them to bypass intended security boundaries and gain unrestricted access across the hierarchy.

**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.