CVE-2026-69414: microsoft malware_protection_engine Improper Access Control
CVSS: 7.8v3.1HighModified
Published 14-08-2026Last modified 08-10-2026
Vulnerability summary
CVE-2026-69414 is a high (CVSS 7.8) Improper Access Control vulnerability in microsoft malware_protection_engine. EPSS estimates a 1.32% chance of exploitation in the next 30 days, higher than 70.4% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.8/10
010
High · v3.1 (CVE.org)EPSS score
1.32%
0%100%
Low · +0.76 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Timeline
- 14-08-2026PublishedVulnerability first disclosed.
- 08-10-2026Last modifiedVulnerability information updated.
Description
Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "ShieldBreak ".
CVSS metrics
2 scores · 2 sources · 1 versionHigh 7.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:CSourcesAll 2 agree
- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
1.32%
Chance of exploitation in the next 30 days
Percentile
70%
Versus all other CVEs
30-day change
+0.76 pp
From 0.56% on 19-09-2026
19-09-202619-10-2026
EPSS score1.32%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundShieldbreak
Maturity: poc
Weaknesses
CWE · root cause- CWE-284Improper Access ControlThe product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
- CWE-269Improper Privilege ManagementThe product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
Affected systems
Microsoft2 products
- malware_protection_enginena
- microsoft malware protection engine≥ 1.1.0.0, < 1.1.26080.3
1 vendor · 2 products
