CVE-2015-6175 is a kernel privilege escalation vulnerability in Microsoft Windows. CISA added it to the Known Exploited Vulnerabilities catalogue on 25 May 2022, which means attackers have used it in real attacks. The kernel in Microsoft Windows contains a vulnerability that allows local users to gain privileges via a crafted application.
What CVE-2015-6175 Means in Practice
This vulnerability sits in the Windows kernel, so the security issue is not a normal application bug, it is a path from local code execution to elevated system authority. That makes it especially serious on endpoints where an attacker can already run code, because the kernel is the trust boundary that enforces privilege separation.
For a glossary page, the important point is that privilege escalation vulnerabilities convert a limited foothold into broader control. In this case, the danger is not just that a crafted application can trigger the flaw, but that the attacker may gain the ability to bypass ordinary user restrictions and act with far greater authority inside the operating system.
Why Kernel Privilege Escalation Is Dangerous
A kernel escalation issue is dangerous because the kernel mediates process privileges, memory access, and core security decisions. Once an attacker reaches kernel-level capability, many protections that rely on user-mode boundaries become much less effective, including application containment, local account separation, and some endpoint monitoring assumptions.
That is why these bugs often matter even when exploitation starts with a modest access level. The initial access requirement can be low, but the payoff is high: the attacker can disable defenses, steal data, install persistence, or prepare the host for lateral movement. For context on how privilege escalation fits into broader adversary behaviour, see the MITRE ATT&CK Enterprise Matrix.
How Organisations Check Exposure and Prioritise Response
Exposure review starts with asset inventory, because the question is not whether the vulnerability exists in the abstract, but whether a given Windows endpoint, server, or embedded system is still reachable and relevant to the environment. Teams should then check vendor advisories, patch status, and whether the affected systems are internet-facing, highly privileged, or used for sensitive workloads.
Because CISA placed this CVE in the Known Exploited Vulnerabilities catalogue on 25 May 2022, prioritisation should be based on known exploitation, not just theoretical severity. The authoritative record is the NIST National Vulnerability Database, and the CVE record itself should be cross-checked through the CVE Program.
Remediation, Detection, and Identity Impact
The primary remediation is to apply the vendor fix as soon as possible, but where patching is delayed, organisations should reduce exposure by limiting local code execution paths, restricting administrative access, and tightening monitoring on systems that could be used as launch points. That is especially important on devices where users routinely run untrusted software or where privileged operators sign into shared workstations.
Detection should focus on unusual privilege changes, suspicious child processes from low-privilege contexts, and signs that an attacker used the host to move from user mode into higher authority. If exploitation is suspected, review whether local administrator credentials, active sessions, service accounts, or cached tokens on the system may need rotation or revalidation after containment.
Risk and Threat Considerations
This kind of kernel flaw matters because it turns ordinary local execution into a route toward full host compromise. In practice, attackers use that jump to weaken defenses, harvest secrets, and extend access beyond the initial user context, which makes post-exploitation cleanup more expensive than a simple software patch.
Failure mechanism: A crafted application triggers the kernel bug and elevates the attacker from limited user rights to a more trusted operating context, defeating the boundary the operating system relies on for privilege separation.
Impact: The attacker may gain stronger persistence, credential access, security control tampering, or a stepping stone for lateral movement, especially if the affected system holds administrative sessions or sensitive local material.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
MITRE ATT&CK addresses the attack surface, NIST SP 800-53 Rev 5, CIS Controls v8 and NIST CSF 2.0 set the technical controls, and ISO/IEC 27001:2022 defines the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| MITRE ATT&CK | T1068 — Exploitation for Privilege Escalation | This CVE is a local kernel escalation path to higher privileges. |
| Recommendation — Map suspicious local execution to privilege-escalation activity and hunt for post-exploitation actions. | ||
| NIST SP 800-53 Rev 5 | SI-2 — Flaw Remediation | Patch and vulnerability response are central for a KEV-listed kernel flaw. |
| Recommendation — Prioritise remediation for the vulnerable Windows hosts and verify fixes are deployed. | ||
| CIS Controls v8 | CIS-7 — Continuous Vulnerability Management | Known-exploited kernel vulnerabilities require asset scope, prioritisation, and remediation tracking. |
| Recommendation — Track affected Windows assets, prioritise exploitation-prone systems, and confirm remediation. | ||
| NIST CSF 2.0 | PR.IP-12 — Vulnerability Management | The term directly concerns managing a known exploited vulnerability across hosts. |
| Recommendation — Use vulnerability management processes to identify, prioritise, and close exposed systems. | ||
| ISO/IEC 27001:2022 | A.8.8 — Management of technical vulnerabilities | Kernel privilege escalation is addressed through vulnerability handling and remediation discipline. |
| Recommendation — Manage technical vulnerabilities through inventory, assessment, and timely remediation. | ||
Practitioner Guidance
What to watch for: Treat any Windows host with this CVE as a high-priority remediation item if it is exposed to untrusted code, used interactively by users, or managed with elevated privileges. In those cases, exposure is not just about the patch state, it is about whether the host can be a reliable foothold for escalation.
Practitioner takeaway: For exploited kernel CVEs, patching is necessary but not sufficient, because the follow-on review of privilege, session, and account compromise is what determines whether the incident is truly contained.
Related resources from NHI Mgmt Group
- CVE-2024-38106 (Microsoft Windows Kernel Privilege Escalation)
- CVE-2014-1812 (Microsoft Windows Group Policy Preferences Password Privilege Escalation)
- CVE-2019-1388 (Microsoft Windows Certificate Dialog Privilege Escalation)
- CVE-2024-38107 (Microsoft Windows Power Dependency Coordinator Privilege Escalation)