# CVE-2025-7771

## Summary

- **CVE ID:** CVE-2025-7771
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H)
- **CWE:** CWE-782
- **Published:** Aug 6, 2025
- **Last Modified:** Mar 12, 2026

## Description

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.

## Affected Products

- TechPowerUp — ThrottleStop (3.0.0.0 and possibly others)

## References

- [CNA](https://github.com/klsecservices/Advisories/blob/master/K-TechPowerUp-2025-001.md)
- [CNA](https://www.techpowerup.com/download/techpowerup-throttlestop/)
- [CNA](https://securelist.com/av-killer-exploiting-throttlestop-sys/117026/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 6.83%
- **EPSS Percentile:** 93.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._