Technology · Microsoft
Microsoft Defender vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 8 vulnerabilities in Microsoft Defender: 0 in the last 7 days and 1 in the last 90 days, 6 of them critical and 6 exploited in the wild. The most recent, CVE-2026-69414, was published on 14 August 2026.
- Last 7 days
- 0
- Last 90 days
- 1
- Critical, all time
- 6
- Exploited in the wild
- 6
About Microsoft Defender
A security software suite providing antivirus, firewall, and endpoint protection for Windows environments.
Latest Microsoft Defender vulnerabilities
- CVE-2026-69414: Microsoft Defender Malware Protection Engine elevation of privilegehighCVSS 7.8EPSS 0.3%
- CVE-2026-45584: Microsoft Defender heap buffer overflowhighCVSS 8.1
- CVE-2026-45498: Microsoft Defender denial of servicecriticalexploited in the wildCVSS 4
- CVE-2026-41091: Microsoft Defender privilege escalation via improper link resolutioncriticalexploited in the wildCVSS 7.8
- CVE-2008-4250: Microsoft Windows buffer overflow in Server servicecriticalexploited in the wildCVSS 10EPSS 93.5%
- CVE-2026-33825: Microsoft Defender privilege escalation in Antimalware Platformcriticalexploited in the wildCVSS 7.8EPSS 6.8%
- CVE-2022-44698: Microsoft Defender SmartScreen Security Feature Bypass Vulnerabilitycriticalexploited in the wildCVSS 5.4
- CVE-2021-1647: Microsoft Defender Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 7.8
Most severe Microsoft Defender vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2008-4250: Microsoft Windows buffer overflow in Server servicecriticalexploited in the wildCVSS 10EPSS 93.5%
- CVE-2026-33825: Microsoft Defender privilege escalation in Antimalware Platformcriticalexploited in the wildCVSS 7.8EPSS 6.8%
- CVE-2026-41091: Microsoft Defender privilege escalation via improper link resolutioncriticalexploited in the wildCVSS 7.8
- CVE-2021-1647: Microsoft Defender Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 7.8
- CVE-2022-44698: Microsoft Defender SmartScreen Security Feature Bypass Vulnerabilitycriticalexploited in the wildCVSS 5.4
- CVE-2026-45498: Microsoft Defender denial of servicecriticalexploited in the wildCVSS 4
- CVE-2026-45584: Microsoft Defender heap buffer overflowhighCVSS 8.1
- CVE-2026-69414: Microsoft Defender Malware Protection Engine elevation of privilegehighCVSS 7.8EPSS 0.3%
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 1 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/defender.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Microsoft Defender vulnerabilities", https://junglewise.ai/threats/technologies/defender, 26 September 2026.