CVE-2025-47161Public exploit

Root code execution via writable OpenSSL path

Published May 15, 2025 · Updated Feb 26, 2026

Improper access control in Microsoft Defender for Endpoint for Linux before 101.25022.0002 allows local users to gain root access. The bundled osqueryi binary hardcodes OPENSSLDIR under the world-writable /tmp/build tree, causing its root-run process to load an attacker-supplied OpenSSL configuration and shared object. Any unprivileged local account can stage those files and execute arbitrary code as root when the daemon invokes osqueryi, typically within ten minutes.

CVSS severity7.8
High
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Microsoft Defender for Endpoint for Linux before 101.25022.0002 allows local users to gain root access. The bundled osqueryi binary hardcodes OPENSSLDIR under the world-writable /tmp/build tree, causing its root-run process to load an attacker-supplied OpenSSL configuration and shared object. Any unprivileged local account can stage those files and execute arbitrary code as root when the daemon invokes osqueryi, typically within ten minutes.

The record

CVE
CVE-2025-47161
Published
May 15, 2025
Updated
Feb 26, 2026
Vendor
Microsoft
Product
Microsoft Defender for Endpoint for Linux
Classifications
CWE-284, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record 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=101.0.0 <101.25022.0002

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Microsoft Defender for Endpoint for Linuxversion=101.0.0 <101.25022.0002

Published CVSS scores

7.8Microsoft CorporationCVSS:3.1/AV:L/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
T1068Exploitation for Privilege Escalation

Public exploit references

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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