Technology · Microsoft
Microsoft Office Outlook vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 7 vulnerabilities in Microsoft Office Outlook: 1 in the last 7 days and 6 in the last 90 days, 1 of them critical and 1 exploited in the wild. The most recent, CVE-2026-100208, was published on 25 September 2026.
- Last 7 days
- 1
- Last 90 days
- 6
- Critical, all time
- 1
- Exploited in the wild
- 1
About Microsoft Office Outlook
A personal information manager and email client included in the Microsoft Office suite.
Latest Microsoft Office Outlook vulnerabilities
- CVE-2026-100208: Microsoft Office Outlook integer overflow remote code executionhighCVSS 7.5
- CVE-2026-80073: Microsoft Office Outlook out-of-bounds read information disclosuremediumCVSS 6.5EPSS 0.9%
- CVE-2026-78525: Microsoft Office Outlook use-after-free remote code executionhighCVSS 8.8EPSS 0.8%
- CVE-2026-78520: Microsoft Office Outlook out-of-bounds read allows remote code executionmediumCVSS 6.5EPSS 0.9%
- CVE-2026-78519: Microsoft Office Outlook use of uninitialized resource remote code executionhighCVSS 8.8EPSS 0.8%
- CVE-2026-69629: Microsoft Office Outlook heap-based buffer overflowhighCVSS 8.8EPSS 0.8%
- CVE-2024-21413: Microsoft Outlook Improper Input Validation Vulnerabilitycriticalexploited in the wildCVSS 9.8
Most severe Microsoft Office Outlook vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2024-21413: Microsoft Outlook Improper Input Validation Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2026-78525: Microsoft Office Outlook use-after-free remote code executionhighCVSS 8.8EPSS 0.8%
- CVE-2026-78519: Microsoft Office Outlook use of uninitialized resource remote code executionhighCVSS 8.8EPSS 0.8%
- CVE-2026-69629: Microsoft Office Outlook heap-based buffer overflowhighCVSS 8.8EPSS 0.8%
- CVE-2026-100208: Microsoft Office Outlook integer overflow remote code executionhighCVSS 7.5
- CVE-2026-80073: Microsoft Office Outlook out-of-bounds read information disclosuremediumCVSS 6.5EPSS 0.9%
- CVE-2026-78520: Microsoft Office Outlook out-of-bounds read allows remote code executionmediumCVSS 6.5EPSS 0.9%
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 | 5 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 1 | 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/office-outlook.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 Office Outlook vulnerabilities", https://junglewise.ai/threats/technologies/office-outlook, 26 September 2026.