Exploitation active confirmée

Ajoutée au catalogue CISA KEV le 22/04/2026, correctif exigé avant le 06/05/2026 pour les agences fédérales américaines.

Action requise : Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Description officielle (NVD)

Microsoft Defender contains an insufficient granularity of access control vulnerability that could allow an authorized attacker to escalate privileges locally.

Preuves de concept publiques (7)

Dépôts tiers non vérifiés, parfois piégés. Ne les exécutez jamais en production : uniquement dans un environnement de test isolé.

Letlaka/redsun-bluehammer-undefend-detection-pack · ★ 10 · 17/04/2026
Microsoft Defender XDR KQL detections for RedSun, BlueHammer, UnDefend, and CVE-2026-33825-related Defender abuse behaviors.
0xBlackash/CVE-2026-33825 · ★ 9 · 18/05/2026
CVE-2026-33825
Joe1sn/CVE-2026-33825 · ★ 4 · 02/05/2026
RedSun PoC for self use
Bilal3755/Detecting_blue_hammer_vuln · ★ 0 · 20/04/2026
Threat hunting query for bluehammer CVE windows CVE-2026-33825
kaleth4/CVE-2026-33825 · ★ 0 · 22/04/2026
anasabugaddara-ux/defender-bluehammer-audit · ★ 0 · 01/10/2026
Defensive Metasploit post module for CVE-2026-33825 (BlueHammer): Defender version/posture detection + compromise-hunt. Detection only.
dntaskmehow/NEO-DEFENDER · ★ 0 · 20/10/2026
This framework has been **RE-WEAPONIZED** & exploits CVE-2026-33825, a local privilege escalation (LPE) vulnerability in Microsoft Defender caused by insufficient access control granularity. The explo