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ShieldBreak is an elevation-of-privilege vulnerability in the Microsoft Malware Protection Engine used by Microsoft Defender. The issue was publicly disclosed with proof-of-concept code and was described as a bypass of the prior RoguePlanet remediation. Reported exploitation abuses Cloud Filter API behavior during cloud-file hydration to cause privileged Defender processing to cross an intended security boundary. Microsoft remediated CVE-2026-69414 in Malware Protection Engine version 1.1.26080.3.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
78 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Microsoft Defender vulnerability whose patch could be bypassed by ShieldCrash under certain conditions.
A Microsoft Defender privilege-escalation vulnerability/exploit that was patched by Microsoft, though the article reports the fixes were incomplete and could be bypassed by ShieldCrash.
A Microsoft Malware Protection Engine patch-bypass vulnerability, branded ShieldBreak, which bypassed the RoguePlanet fix and was patched in September 2026.
An elevation-of-privilege flaw in Microsoft Defender's Malware Protection Engine that bypassed the RoguePlanet patch through Cloud Filter API manipulation during cloud-file hydration.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.