Was Windows Defender Hacked?
No Publicly Reported Incidents. As of May 2026, Windows Defender has no publicly reported security breaches, hacks, or CVE entries in the databases Nerq monitors. This covers the National Vulnerability Database (NVD), GitHub Security Advisories, and OSV.dev. Nerq's automated security analysis rates Windows Defender's security posture as strong (security dimension score: 90/100). Trust Score: 65/100 (B-). Last checked: 2026-04-30.
No Publicly Reported Incidents
Security Incident Summary
| CVE Count | 0 |
|---|---|
| Critical CVEs | 0 |
| Breach Status | No Publicly Reported Incidents |
| Trust Score | 65/100 (B-) |
| Security Dimension | 90/100 |
| Publisher | Unknown |
| Registry | N/A |
What We Check
- National Vulnerability Database (NVD) — CVE entries for publicly disclosed vulnerabilities
- GitHub Security Advisories — security alerts for open-source dependencies
- OSV.dev — Google's open-source vulnerability database
- Public breach reports — media reports and incident disclosures
Full Trust Analysis
For a complete safety assessment including privacy, maintenance, and community trust signals, see Windows Defender Trust Score on Nerq.
FAQ
Has Windows Defender been hacked?
As of May 2026, Windows Defender has no publicly reported security breaches, hacks, or CVE entries in the databases Nerq monitors. This covers the National Vulnerability Database (NVD), GitHub Security Advisories, and OSV.dev.
How many CVEs does Windows Defender have?
Windows Defender has 0 CVE entries (0 critical). CVEs are publicly disclosed vulnerabilities tracked by MITRE and the NVD.
Is Windows Defender safe to use after a breach?
With no reported breaches, Windows Defender appears safe based on available data.
Where can I check Windows Defender's security history?
Nerq monitors NVD (nvd.nist.gov), GitHub Security Advisories, and OSV.dev for Windows Defender. View the full trust analysis at nerq.ai/safe/windows-defender.
Safe? Legit? Scam?
Spyware? Privacy Pros/Cons
Review What is it? Who owns?
Alternatives Use safely
Kids? Trending Leaderboard
Updated May 2026. Trust scores based on automated analysis.