CVE-2025-7771

What it is

ThrottleStop.sys, a legitimate driver, exposes two IOCTL interfaces that allow arbitrary read and write access to physical memory via the MmMapIoSpace function. This insecure implementation can be exploited by a malicious user-mode application to patch the running Windows kernel and invoke arbitrary kernel functions with ring-0 privileges. The vulnerability enables local attackers to execute arbitrary code in kernel context, resulting in privilege escalation and potential follow-on attacks, such as disabling security software or bypassing kernel-level protections. ThrottleStop.sys version 3.0.0.0 and possibly others are affected. Apply updates per vendor instructions.

At a glance

Exploitability

Can be exploited locally on the machine with an admin-level account. High risk of data exposure, data tampering, service disruption.

Exploit odds

8.3% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2025-08-06 10:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 10:05 UTC Last updatedMost recent change to the record

Details

Published

2025-08-06 10:15 UTC

Last modified

2026-06-17 10:05 UTC

Exploit probability

8.3% · EPSS, next 30 days

Weakness

CWE-782

Record status

Deferred

Attack profile CVSS 4.0 · 8.7

Attack vector

Local

Complexity

High

Attack requirements

None

Privileges needed

High

User interaction

None

Confidentiality

High

Integrity

High

Availability

High