# Microsoft Defender for Endpoint Spoofing Vulnerability

CVE record · `CVE-2022-23278`

- **Identifiers:** `CVE-2022-23278`
- **State:** Confirmed
- **Severity:** CVSS 5.9 Medium
- **Critical:** No
- **CNA:** microsoft
- **Technologies:** [Microsoft Defender for Endpoint for Linux](https://agentprime.io/advisories/technology/microsoft-defender-for-endpoint-for-linux.md) · [Microsoft Defender for Endpoint for Mac](https://agentprime.io/advisories/technology/microsoft-defender-for-endpoint-for-mac.md) · [Microsoft Defender for Endpoint for Android](https://agentprime.io/advisories/technology/microsoft-defender-for-endpoint-for-android.md) · [Microsoft Defender for Endpoint for iOS](https://agentprime.io/advisories/technology/microsoft-defender-for-endpoint-for-ios.md) · [Microsoft Defender for Endpoint for Windows](https://agentprime.io/advisories/technology/microsoft-defender-for-endpoint-for-windows.md) · [Microsoft Defender for Endpoint EDR sensor](https://agentprime.io/advisories/technology/microsoft-defender-for-endpoint-edr-sensor.md)
- **Published:** 9 Mar 2022
- **Updated:** 8 Jul 2025
- **Reviewed by a person:** No

Published by the CVE Program (CNA: microsoft) at 9 Mar 2022, 17:06 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Microsoft. Product: Microsoft Defender for Endpoint for Linux.
  - affected: `101.0.0 to before 101.60.93` (custom)
- Vendor: Microsoft. Product: Microsoft Defender for Endpoint for Mac.
  - affected: `101.0.0 to before 101.60.91` (custom)
- Vendor: Microsoft. Product: Microsoft Defender for Endpoint for Android.
  - affected: `1.0.0.0 to before 1.0.3011.0302` (custom)
- Vendor: Microsoft. Product: Microsoft Defender for Endpoint for iOS.
  - affected: `1.0.0.0 to before 1.1.18090109` (custom)
- Vendor: Microsoft. Product: Microsoft Defender for Endpoint for Windows.
  - affected: `1.0.0.0 to before 10.0.19042.1586` (custom)
- Vendor: Microsoft. Product: Microsoft Defender for Endpoint EDR sensor.
  - affected: `1.0.0.0 to before 10.8047.22439` (custom)

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 5.9 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C`, from CNA (microsoft)

- **CISA KEV:** Not listed.
- **EPSS:** 0.019, the 79th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 9 Mar 2022. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2022-23278](https://www.cve.org/CVERecord?id=CVE-2022-23278)
- [NVD: CVE-2022-23278](https://nvd.nist.gov/vuln/detail/CVE-2022-23278)

### References from the CNA

- <https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-23278> (vendor-advisory)

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2022-23278>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2022-23278/>. Everything for agents: <https://agentprime.io/llms.txt>.