CVE-2026-69414 json
Microsoft Defender Elevation of Privilege Vulnerability
published 2026-08-14 2 mo ago modified 2026-10-30 9 d ago also EUVD-2026-58811
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 72%
- public exploits
- 0
- none known
Summary
Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "ShieldBreak ".
Patch / fix
- Microsoft Microsoft Malware Protection Engine 1.1.26080.3
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
1.37% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/MSNightmare/ShieldBreak referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C |
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Microsoft Microsoft Malware Protection Engine
Classification
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-69414
vendor-advisory, patch
-
github.com
/MSNightmare/ShieldBreak
exploit
Sources
- CVE List CVE-2026-69414
- NVD CVE-2026-69414
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