CVE-2025-33064Network attack vector

Authenticated code execution via crafted RRAS message

Published Jun 10, 2025 · Updated Feb 20, 2026

Heap-based buffer overflow in Microsoft Windows RRAS allows remote authenticated users to execute code via a crafted protocol message. Microsoft has not disclosed the parsing locus or length-handling error that causes the service's heap buffer to overflow. Any authenticated user can trigger it without administrative privileges when an RRAS server endpoint is exposed, leading to code execution.

CVSS severity8.8
High
EPSS probability1.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Microsoft Windows RRAS allows remote authenticated users to execute code via a crafted protocol message. Microsoft has not disclosed the parsing locus or length-handling error that causes the service's heap buffer to overflow. Any authenticated user can trigger it without administrative privileges when an RRAS server endpoint is exposed, leading to code execution.

The record

CVE
CVE-2025-33064
Published
Jun 10, 2025
Updated
Feb 20, 2026
Vendor
Microsoft
Product
Windows 10 Version 1507
Classifications
CWE-122, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.10240.0 <10.0.10240.21034

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Windows 10 Version 1507version=10.0.10240.0 <10.0.10240.21034
Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.7434
Microsoft · Windows Server 2025 (Server Core installation)version=10.0.26100.0 <10.0.26100.4349
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.8148
Microsoft · Windows 11, version 24H2version=10.0.26100.0 <10.0.26100.4349
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.25522
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.25522
Microsoft · Windows 10 Version 21H2version=10.0.19044.0 <10.0.19044.5965
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.1665
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.8148
Microsoft · Windows 11 Version 22H3version=10.0.22631.0 <10.0.22631.5472
Microsoft · Windows Server 2008 R2 Service Pack 1version=6.1.7601.0 <6.1.7601.27769
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)version=6.1.7601.0 <6.1.7601.27769
Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.5965
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.22620
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.7434
Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.5472
Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.5472
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.8148
Microsoft · Windows Server 2008 Service Pack 2version=6.0.6003.0 <6.0.6003.23351
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.3807
Microsoft · Windows Server 2025version=10.0.26100.0 <10.0.26100.4349
Microsoft · Windows 10 Version 1809version=10.0.17763.0 <10.0.17763.7434
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.22620
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)version=6.0.6003.0 <6.0.6003.23351

Published CVSS scores

8.8Rapid7CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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