CVE-2025-62220Network attack vector

Remote code execution via Remote Desktop heap overflow

Published Nov 11, 2025 · Updated Nov 11, 2025

Heap-based buffer overflow in Microsoft Windows Subsystem for Linux GUI before 2.6.2 allows remote attackers to execute code. The vulnerable locus is the Remote Desktop client, where network data corrupts a heap buffer and code runs in the Windows host process msrdc.exe. Exploitation requires no authentication but requires user interaction in the Remote Desktop client; Microsoft reports no known exploitation in the wild.

CVSS severity8.8
High
EPSS probability0.67%
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 Subsystem for Linux GUI before 2.6.2 allows remote attackers to execute code. The vulnerable locus is the Remote Desktop client, where network data corrupts a heap buffer and code runs in the Windows host process msrdc.exe. Exploitation requires no authentication but requires user interaction in the Remote Desktop client; Microsoft reports no known exploitation in the wild.

The record

CVE
CVE-2025-62220
Published
Nov 11, 2025
Updated
Nov 11, 2025
Vendor
Microsoft
Product
Windows Subsystem for Linux GUI
Classifications
CWE-122, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 11, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=1.0.0 <2.6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Windows Subsystem for Linux GUIversion=1.0.0 <2.6.2

Published CVSS scores

7.7Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
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-122Heap-based Buffer Overflow
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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