CVE-2023-21809
Microsoft Defender for Endpoint Security Feature Bypass Vulnerability
Microsoft Defender for Endpoint Security Feature Bypass Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Microsoft Defender for Endpoint Security Feature Bypass Vulnerability
Microsoft Defender for Endpoint Security Feature Bypass Vulnerability
- Record
CVE-2023-21809- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2023-25975
Microsoft Defender for Endpoint Security Feature Bypass Vulnerability
- Record
EUVD-2023-25975- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-fvfp-w3v3-v2cp
Microsoft Defender for Endpoint Security Feature Bypass Vulnerability
Microsoft Defender for Endpoint Security Feature Bypass Vulnerability
- Record
GHSA-fvfp-w3v3-v2cp- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
NVD
Microsoft Defender for Endpoint Security Feature Bypass Vulnerability
- Record
CVE-2023-21809- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-21809 is a high vulnerability (CVSS 7.8) in Microsoft Defender Security Intelligence Updates, published February 14, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.60%, the 49th percentile. No source names a fixed version.