CVE-2026-122194
Microsoft Defender Remote Code Execution Vulnerability
Null pointer dereference in Microsoft Defender allows an unauthorized attacker to execute code over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- 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 Remote Code Execution Vulnerability
Null pointer dereference in Microsoft Defender allows an unauthorized attacker to execute code over a network.
- Record
CVE-2026-122194- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-476
- Updated
- 2026-11-10
EUVDEUVD-2026-122266
Null pointer dereference in Microsoft Defender allows an unauthorized attacker to execute code over a network.
- Record
EUVD-2026-122266- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-11
GitHub AdvisoriesGHSA-fv2h-3mhx-678p
Null pointer dereference in Microsoft Defender allows an unauthorized attacker to execute code...
Null pointer dereference in Microsoft Defender allows an unauthorized attacker to execute code over a network.
- Record
GHSA-fv2h-3mhx-678p- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-476
- Updated
- 2026-11-10
NVD
Null pointer dereference in Microsoft Defender allows an unauthorized attacker to execute code over a network.
- Record
CVE-2026-122194- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-476
- Updated
- 2026-11-11
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| published | EUVD, NVD | |
| published | EUVD, NVD | |
| aliases, references | GitHub Advisories | |
| cwes, references, severity, title | CVE List | |
| first indexed | EUVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-122194 is a high vulnerability (CVSS 8.8) in Microsoft Malware Protection Engine, published November 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.79%, the 56th percentile. No source names a fixed version.