Intel Ethernet Diagnostics Driver CVE-2015-2291

Exploitation requires the Intel Ethernet diagnostics driver (IQVW32.sys or IQVW64.sys version 1.03.0.7) to be installed and loaded in the Windows kernel, which occurs when Intel PROSet diagnostic utilities or Intel Network Adapter management software has been installed on the system. The attacker must have local access with authenticated low-privileged user credentials (PR:L) capable of executing code on the target Windows system-standard user account permissions are sufficient as the vulnerable IOCTL interfaces are accessible to non-administrator accounts. The driver device objects must be accessible from user-mode, which is the default installation configuration. Exploitation is limited to local attack vectors (AV:L) only-remote exploitation is not possible without first achieving code execution through separate initial access mechanisms such as RDP compromise, exploited services, or social engineering. No user interaction (UI:N) is required once the attacker has local code execution capability. The vulnerability is not exploitable on systems where Intel diagnostics drivers were never installed or have been completely removed, and patching to driver version 1.3.1.0 or later definitively prevents exploitation regardless of other configuration factors.

This vulnerability presents elevated real-world risk across multiple threat indicators. CISA KEV listing confirms documented exploitation by threat actors targeting Windows systems with Intel network diagnostics installed, moving this beyond theoretical risk into confirmed adversary tradecraft. The 4.99% EPSS score at 90th percentile indicates significantly elevated exploitation probability compared to most CVEs, consistent with the availability of multiple public proof-of-concept exploits since 2015 (Exploit-DB 36392, Packet Storm Security). However, actual exploitability requires specific context: the CVSS vector (AV:L/PR:L) indicates local access with low-privileged authentication is mandatory-this is not a remote wormable threat but rather a post-compromise privilege escalation vector. Attack complexity is low (AC:L) once local access is achieved, with no user interaction required. The scope remains unchanged (S:U), meaning exploitation affects only the vulnerable kernel component without lateral movement capability. Real-world attack patterns show this CVE typically appears in multi-stage intrusions where attackers chain it after initial access (phishing, RDP compromise, or supply chain) to achieve SYSTEM-level persistence. Priority depends on environment: high-priority patching for endpoint fleets with Intel NICs, lower priority for servers where the diagnostics driver may not be installed by default. The 2015 disclosure date means mature exploit tooling exists across adversary skill levels, reducing the barrier to exploitation.

An attacker who has already compromised a user account via phishing or credential theft installs a malicious executable on the target Windows workstation. The malware enumerates installed drivers and detects the presence of vulnerable IQVW32.sys or IQVW64.sys. Using publicly available exploit code (Exploit-DB 36392), the malware opens a handle to the driver's device object and sends a crafted IOCTL 0x80862013 request with specially formatted input buffers designed to trigger a buffer overflow in the kernel driver's dispatch routine. The overflow overwrites kernel memory structures, redirecting execution flow to attacker-controlled shellcode running at Ring 0 with SYSTEM privileges, allowing installation of rootkits, disabling of security software, or deployment of ransomware with maximum system access.