CVE-2025-7771

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 40% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
8.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 7%CVSS: 8.7Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.7
EG Score
8.7(medium)
EPSS
93.3%
KEV
Not listed

Published

August 6, 2025

Last Modified

June 17, 2026

References (3)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 39× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 107 total refreshes for this CVE.

  1. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:24 UTCEPSS rescore
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  1. 2026-07-04 06:31 UTCEPSS rescore
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  34. 2026-06-08 15:49 UTCEG score recompute▲ 8.70
  35. 2026-06-08 15:49 UTCGHSA enrichment
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  73. 2026-05-21 22:43 UTCEPSS rescore
  74. 2026-05-21 10:16 UTCEG score recompute
  75. 2026-05-21 10:16 UTCGHSA enrichment

Publicly available exploits

(10 references)

Working exploit code is in the public domain (9 GitHub PoCs) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-52512
    First seen Apr 22, 2026

    Throttlestop Kernel Driver - Kernel Out-of-Bounds Write Privilege Escalation

    Open source ↗
  • GitHub PoCD4rkks/CVE-2025-7771-Vulnerability-Exploration
    First seen Apr 17, 2026

    Escalating privilege in the system from unsigned driver using throttlestop vulnerability

    Open source ↗
  • GitHub PoCDeathShotXD/0xKern3lCrush
    First seen Feb 4, 2026

    Advanced PoC & Research for CVE-2026-0828 (Safetica) and CVE-2025-7771 (ThrottleStop). Analysis of BYOVD (Bring Your Own Vulnerable Driver) TTPs for Ring 0 process termination and physical memory R/W. Researching EDR-Killer patterns, PPL bypasses, and kernel-mode primitives used by MedusaLocker and other threat actors.

    Open source ↗
  • GitHub PoClzty/CVE-2025-7771
    First seen Jan 21, 2026

    This Poc demonstrate Arbitrary read/write primitives provided by CVE-2025-7771

    Open source ↗
  • GitHub PoCxM0kht4r/CVE-2025-7771
    First seen Jan 13, 2026

    A simple PoC demonstrating the vulnerability in the ThrottleStop.sys driver, showcasing arbitrary physical memory read and write capabilities, as well as virtual-to-physical address translation using Superfetch.

    Open source ↗
  • GitHub PoCv31l0x1/ThrottleStopPPL
    First seen Dec 31, 2025

    Poc for CVE-2025-7771 to modify PPL Protection

    Open source ↗
  • GitHub PoCAmrHuss/throttlestop-exploit-rw
    First seen Nov 13, 2025

    Arbitrary physical memory read/write exploitation using ThrottleStop.sys (CVE-2025-7771) with superfetch address translation - Windows kernel security research

    Open source ↗
  • GitHub PoCGabriel-Lacorte/CVE-2025-7771
    First seen Oct 3, 2025

    Arbitrary Function Call Exploit using the ThrottleStop driver

    Open source ↗
  • GitHub PoCDemoo1337/ThrottleStop
    First seen Sep 7, 2025

    CVE-2025-7771 ThrottleStop.sys privilege escalation exploit - unrestricted IOCTL access to physical memory via MmMapIoSpace

    Open source ↗
  • GitHub PoCfxrstor/ThrottleStopPoC
    First seen Aug 31, 2025

    CVE-2025-7771: Arbitrary physical memory and I/O port read/write via ThrottleStop driver

    Open source ↗

Frequently asked(5)

What is CVE-2025-7771?
CVE-2025-7771 is a high vulnerability published on August 6, 2025. 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…
When was CVE-2025-7771 disclosed?
CVE-2025-7771 was first published in the National Vulnerability Database on August 6, 2025, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-7771 actively exploited?
CVE-2025-7771 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 93.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-7771?
CVE-2025-7771 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2025-7771?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-7771, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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