Technology · Microsoft
Microsoft Defender vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 10 vulnerabilities in Microsoft Defender: 1 in the last 7 days and 2 in the last 90 days, 6 of them critical and 6 exploited in the wild. The most recent, CVE-2026-122194, was published on 10 November 2026. 1 vulnerability in the last four weeks, up from none in the four before.
- Last 7 days
- 1
- Last 90 days
- 2
- Critical, all time
- 6
- Exploited in the wild
- 6
About Microsoft Defender
Microsoft Defender is an antimalware and endpoint protection security suite.
Latest Microsoft Defender vulnerabilities
- CVE-2026-122194: Microsoft Defender null pointer dereference remote code executionhighCVSS 8.8
- CVE-2026-105726: Microsoft Defender out-of-bounds read information disclosuremediumCVSS 5.5EPSS 0.4%
- 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-2026-122194: Microsoft Defender null pointer dereference remote code executionhighCVSS 8.8
- 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%
- CVE-2026-105726: Microsoft Defender out-of-bounds read information disclosuremediumCVSS 5.5EPSS 0.4%
Vulnerabilities per week
1 vulnerability in the last four weeks, up from none in the four before. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 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 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 1 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 1 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many Microsoft Defender vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/defender)<a href="https://junglewise.ai/threats/technologies/defender"><img src="https://junglewise.ai/threats/technologies/defender/badge.svg" alt="Microsoft Defender vulnerabilities" /></a>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, and this page as text at https://junglewise.ai/threats/technologies/defender.md, 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, 13 November 2026.