Index / Exploitation for Priv-Esc / Microsoft
Bypass Record

Exploitation for Priv-Esc × Microsoft Defender

A publicly-reported instance of Exploitation for Priv-Esc bypassing Microsoft Defender, recorded with its original source. Factual record; no assessment of any specific deployment.

Product
Microsoft Defender
Technique
Exploitation for Priv-Esc
MITRE ATT&CK
T1068
Confidence
High
Severity
High
Status
poc
Disclosed
2026-04-07
Config / version noted
Not stated

Provenance

Reported as

BlueHammer is a disclosed Windows zero-day vulnerability that leverages the Microsoft Defender update mechanism to achieve privilege escalation.

Mechanism

The exploit abuses the Defender update process to escalate privileges, though specific technical steps are not detailed in the provided text.

Detection & mitigation

Monitor for suspicious child processes spawned by the Microsoft Defender update service (e.g., MsMpEng.exe or related update components) and unexpected file writes to Defender directories. Apply the vendor patch immediately when available and enforce least privilege to limit exploitation impact.

Exploitation for Priv-Esc has also been recorded against

AppleAtlassianBitdefenderBroadcom (Symantec)Comodo SecurityConnectWiseCrowdStrikeElasticESETF5FortinetGoogle

This is a record of a publicly-reported event, not an assessment of any specific organization's deployment. Detection and mitigation notes are drawn from the cited source. Where the source is silent, fields are omitted.