Technology · Microsoft
Microsoft MSHTML vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 3 vulnerabilities in Microsoft MSHTML: 0 in the last 7 days and 0 in the last 90 days, 3 of them critical and 3 exploited in the wild. The most recent, CVE-2026-21513, was published on 10 February 2026.
- Last 7 days
- 0
- Last 90 days
- 0
- Critical, all time
- 3
- Exploited in the wild
- 3
About Microsoft MSHTML
A software component used by Internet Explorer and other applications to render web pages on Windows.
Latest Microsoft MSHTML vulnerabilities
- CVE-2026-21513: Microsoft MSHTML Framework protection mechanism failurecriticalexploited in the wildCVSS 8.8EPSS 31.0%
- CVE-2021-40444: Microsoft MSHTML Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2019-0541: Microsoft MSHTML Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
Most severe Microsoft MSHTML vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-21513: Microsoft MSHTML Framework protection mechanism failurecriticalexploited in the wildCVSS 8.8EPSS 31.0%
- CVE-2021-40444: Microsoft MSHTML Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2019-0541: Microsoft MSHTML Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
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 | 0 | 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/mshtml.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 MSHTML vulnerabilities", https://junglewise.ai/threats/technologies/mshtml, 26 September 2026.