Telemetry spoofing via unauthenticated client-service messages
Published Mar 9, 2022 · Updated Jul 8, 2025
Spoofing in affected Microsoft Defender for Endpoint releases allows remote attackers to alter client information sent to the service. The vulnerable client-to-service channel accepted information attributed to a spoofed device or duplicate device ID; Microsoft has not disclosed the exact validation error. No privileges or user interaction are required, but exploitation has high complexity and affects telemetry integrity rather than confidentiality or availability.
Summary
What happened
Spoofing in affected Microsoft Defender for Endpoint releases allows remote attackers to alter client information sent to the service. The vulnerable client-to-service channel accepted information attributed to a spoofed device or duplicate device ID; Microsoft has not disclosed the exact validation error. No privileges or user interaction are required, but exploitation has high complexity and affects telemetry integrity rather than confidentiality or availability.
The record
- CVE
- CVE-2022-23278
- Published
- Mar 9, 2022
- Updated
- Jul 8, 2025
- Vendor
- Microsoft
- Product
- Microsoft Defender for Endpoint for Windows
- Classifications
- T1036
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 9, 2022CVE publishedPublication date reported by the CVE source.
- Jul 8, 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.
- Affected versionversion=1.0.0.0 <10.0.19042.1586
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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