CVE-2025-62549Network attack vector

Remote code execution via untrusted pointer dereference

Published Dec 9, 2025 · Updated Apr 16, 2026

Untrusted pointer dereference in Microsoft Windows RRAS allows remote attackers to execute code after a user connects to a malicious server. RRAS treats attacker-controlled data returned by that server as a pointer and dereferences it; Microsoft has not disclosed the affected function or protocol message. Exploitation needs no prior access, but a user must initiate the connection, after which code runs in the affected RRAS process.

CVSS severity8.8
High
EPSS probability1.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Untrusted pointer dereference in Microsoft Windows RRAS allows remote attackers to execute code after a user connects to a malicious server. RRAS treats attacker-controlled data returned by that server as a pointer and dereferences it; Microsoft has not disclosed the affected function or protocol message. Exploitation needs no prior access, but a user must initiate the connection, after which code runs in the affected RRAS process.

The record

CVE
CVE-2025-62549
Published
Dec 9, 2025
Updated
Apr 16, 2026
Vendor
Microsoft
Product
Windows Server 2019
Classifications
CWE-822, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 16, 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=10.0.17763.0 <10.0.17763.8146

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.8146
Microsoft · Windows Server 2025 (Server Core installation)version=10.0.26100.0 <10.0.26100.7462
Microsoft · Windows 11, version 25H2version=10.0.26200.0 <10.0.26200.7462
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.8688
Microsoft · Windows 11, version 24H2version=10.0.26100.0 <10.0.26100.7462
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.25815
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.25815
Microsoft · Windows 10 Version 21H2version=10.0.19044.0 <10.0.19044.6691
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.2025
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.8688
Microsoft · Windows 11 Version 22H3version=10.0.22631.0 <10.0.22631.6345
Microsoft · Windows Server 2008 R2 Service Pack 1version=6.1.7601.0 <6.1.7601.28064
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)version=6.1.7601.0 <6.1.7601.28064
Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.6691
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.22920
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.8146
Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.6345
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.8688
Microsoft · Windows Server 2008 Service Pack 2version=6.0.6003.0 <6.0.6003.23666
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.4529
Microsoft · Windows Server 2025version=10.0.26100.0 <10.0.26100.7462
Microsoft · Windows 10 Version 1809version=10.0.17763.0 <10.0.17763.8146
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.22920
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)version=6.0.6003.0 <6.0.6003.23666

Published CVSS scores

8.8Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-822Untrusted Pointer Dereference
T1203Exploitation for Client Execution

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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