Exploited CVEs / Microsoft / CVE-2026-33825
CVE-2026-33825
Microsoft Defender Insufficient Granularity of Access Control Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted, and the vulnerability is known to be used in ransomware campaigns. Federal agencies were required to remediate by 2026-05-06 (that deadline has passed); treat that date as the outer bound for your own environment. The fix is in the vendor advisory: Microsoft Security Update Guide (MSRC), linked below.
Actively exploited Microsoft Defender vulnerability. Added to the CISA KEV catalog 2026-04-22.
Risk summary
Updated July 25, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2026-33825
Ransomware crews are exploiting the Defender Antimalware Platform itself: this elevation of privilege flaw, CVSS 7.8 and KEV-listed on 2026-04-22, turns the endpoint's protective layer into the escalation path. Antivirus runs with high privileges on every machine, which is exactly why attackers target it.
Do this: Confirm the Defender platform version is current on every endpoint and alert on Defender service tampering.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-33825
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2026-33825
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
CISA required action
Federal (BOD 22-01) remediation due date: 2026-05-06 (past due).
Official fix for CVE-2026-33825
The authoritative fix and affected-version list are published by the vendor. Find the Defender advisory on Microsoft Security Update Guide (MSRC).
Common questions about CVE-2026-33825
Is CVE-2026-33825 actively exploited?
Yes. CVE-2026-33825 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2026-04-22, which means exploitation in the wild has been confirmed, not predicted. CISA also reports it is known to be used in ransomware campaigns.
What is the CISA deadline and required action for CVE-2026-33825?
CISA set the federal (BOD 22-01) remediation due date at 2026-05-06, which has passed; treat any unremediated system as overdue.
What fixes CVE-2026-33825?
The authoritative fix is in the vendor advisory: see Microsoft Security Update Guide (MSRC) for the patched Defender versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2026-33825?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2026-33825's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
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Authoritative references
Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.
