# Microsoft Office Outlook vulnerabilities Source: https://junglewise.ai/threats/technologies/office-outlook Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 11 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/office-outlook.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 25 vulnerabilities in Microsoft Office Outlook: 17 in the last 7 days and 24 in the last 90 days, 2 of them critical and 2 exploited in the wild. The most recent, CVE-2026-124228, was published on 10 November 2026. 1 vulnerability in the last four weeks, level on the four before (1). ## Counts - Last 7 days: 17 - Last 30 days: 18 - Last 90 days: 24 - All time: 25 (2 critical, 2 exploited in the wild) ## About Microsoft Office Outlook Microsoft Outlook is an email client and personal information manager. ## Latest Microsoft Office Outlook vulnerabilities - [CVE-2026-124228: Microsoft Office Outlook path traversal in pathname handling](https://junglewise.ai/threats/cve-2026-124228-improper-limitation-of-a-pathname-to-a-restricted-directory-path) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-124227: Microsoft Office Outlook use of uninitialized resource code execution](https://junglewise.ai/threats/cve-2026-124227-use-of-uninitialized-resource-in-microsoft-office-outlook-allows) (high, CVSS 7.5, published 10 Nov 2026) - [CVE-2026-124194: Microsoft Office Outlook user warning spoofing vulnerability](https://junglewise.ai/threats/cve-2026-124194-microsoft-office-outlook-missing-user-interaction-for) (critical, exploited in the wild, CVSS 6.5, published 10 Nov 2026) - [CVE-2026-123383: Microsoft Office Outlook heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-123383-heap-based-buffer-overflow-in-microsoft-office-outlook-allows-an) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-123382: Microsoft Office Outlook untrusted pointer dereference](https://junglewise.ai/threats/cve-2026-123382-untrusted-pointer-dereference-in-microsoft-office-outlook-allows) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-123381: Microsoft Office Outlook stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-123381-stack-based-buffer-overflow-in-microsoft-office-outlook-allows) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-123379: Microsoft Office Outlook heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-123379-heap-based-buffer-overflow-in-microsoft-office-outlook-allows-an) (high, CVSS 7.5, published 10 Nov 2026) - [CVE-2026-123378: Microsoft Office Outlook integer overflow remote code execution](https://junglewise.ai/threats/cve-2026-123378-integer-overflow-or-wraparound-in-microsoft-office-outlook) (high, CVSS 7.5, published 10 Nov 2026) - [CVE-2026-123376: Microsoft Office Outlook heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-123376-heap-based-buffer-overflow-in-microsoft-office-outlook-allows-an) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-123375: Microsoft Office Outlook stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-123375-stack-based-buffer-overflow-in-microsoft-office-outlook-allows) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-119997: Microsoft Office Outlook heap buffer overflow](https://junglewise.ai/threats/cve-2026-119997-heap-based-buffer-overflow-in-microsoft-office-outlook-allows-an) (high, CVSS 7.8, published 10 Nov 2026) - [CVE-2026-119996: Microsoft Office Outlook heap buffer overflow](https://junglewise.ai/threats/cve-2026-119996-heap-based-buffer-overflow-in-microsoft-office-outlook-allows-an) (high, CVSS 7.5, published 10 Nov 2026) - [CVE-2026-119995: Microsoft Office Outlook heap buffer overflow](https://junglewise.ai/threats/cve-2026-119995-heap-based-buffer-overflow-in-microsoft-office-outlook-allows-an) (high, CVSS 7.5, published 10 Nov 2026) - [CVE-2026-119993: Microsoft Office Outlook type confusion information disclosure](https://junglewise.ai/threats/cve-2026-119993-access-of-resource-using-incompatible-type-type-confusion-in) (medium, CVSS 6.5, published 10 Nov 2026) - [CVE-2026-111309: Microsoft Office Outlook invalid pointer dereference remote code execution](https://junglewise.ai/threats/cve-2026-111309-release-of-invalid-pointer-or-reference-in-microsoft-office) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-110068: Microsoft Office Outlook use-after-free remote code execution](https://junglewise.ai/threats/cve-2026-110068-use-after-free-in-microsoft-office-outlook-allows-an) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-110043: Microsoft Office Outlook heap buffer overflow](https://junglewise.ai/threats/cve-2026-110043-heap-based-buffer-overflow-in-microsoft-office-outlook-allows-an) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-108448: Microsoft Office Outlook heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-108448-heap-based-buffer-overflow-in-microsoft-office-outlook-allows-an) (high, CVSS 7.5, published 15 Oct 2026) - [CVE-2026-100208: Microsoft Office Outlook integer overflow remote code execution](https://junglewise.ai/threats/cve-2026-100208-integer-overflow-or-wraparound-in-microsoft-office-outlook) (high, CVSS 7.5, published 25 Sep 2026) - [CVE-2026-80073: Microsoft Office Outlook out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-80073-microsoft-office-outlook-out-of-bounds-read-information) (medium, CVSS 6.5, published 8 Sep 2026) - [CVE-2026-78525: Microsoft Office Outlook use-after-free remote code execution](https://junglewise.ai/threats/cve-2026-78525-microsoft-office-outlook-use-after-free-remote-code-execution) (high, CVSS 8.8, published 8 Sep 2026) - [CVE-2026-78520: Microsoft Office Outlook out-of-bounds read allows remote code execution](https://junglewise.ai/threats/cve-2026-78520-microsoft-office-outlook-out-of-bounds-read-allows-remote-code) (medium, CVSS 6.5, published 8 Sep 2026) - [CVE-2026-78519: Microsoft Office Outlook use of uninitialized resource remote code execution](https://junglewise.ai/threats/cve-2026-78519-microsoft-office-outlook-use-of-uninitialized-resource-remote) (high, CVSS 8.8, published 8 Sep 2026) - [CVE-2026-69629: Microsoft Office Outlook heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-69629-microsoft-office-outlook-heap-based-buffer-overflow) (high, CVSS 8.8, published 8 Sep 2026) - [CVE-2024-21413: Microsoft Outlook Improper Input Validation Vulnerability](https://junglewise.ai/threats/cve-2024-21413-microsoft-outlook-improper-input-validation-vulnerability) (critical, exploited in the wild, CVSS 9.8, published 6 Feb 2025) ## Most severe Microsoft Office Outlook vulnerabilities - [CVE-2024-21413: Microsoft Outlook Improper Input Validation Vulnerability](https://junglewise.ai/threats/cve-2024-21413-microsoft-outlook-improper-input-validation-vulnerability) (critical, exploited in the wild, CVSS 9.8, published 6 Feb 2025) - [CVE-2026-124194: Microsoft Office Outlook user warning spoofing vulnerability](https://junglewise.ai/threats/cve-2026-124194-microsoft-office-outlook-missing-user-interaction-for) (critical, exploited in the wild, CVSS 6.5, published 10 Nov 2026) - [CVE-2026-78525: Microsoft Office Outlook use-after-free remote code execution](https://junglewise.ai/threats/cve-2026-78525-microsoft-office-outlook-use-after-free-remote-code-execution) (high, CVSS 8.8, published 8 Sep 2026) - [CVE-2026-78519: Microsoft Office Outlook use of uninitialized resource remote code execution](https://junglewise.ai/threats/cve-2026-78519-microsoft-office-outlook-use-of-uninitialized-resource-remote) (high, CVSS 8.8, published 8 Sep 2026) - [CVE-2026-69629: Microsoft Office Outlook heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-69629-microsoft-office-outlook-heap-based-buffer-overflow) (high, CVSS 8.8, published 8 Sep 2026) - [CVE-2026-124228: Microsoft Office Outlook path traversal in pathname handling](https://junglewise.ai/threats/cve-2026-124228-improper-limitation-of-a-pathname-to-a-restricted-directory-path) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-123383: Microsoft Office Outlook heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-123383-heap-based-buffer-overflow-in-microsoft-office-outlook-allows-an) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-123382: Microsoft Office Outlook untrusted pointer dereference](https://junglewise.ai/threats/cve-2026-123382-untrusted-pointer-dereference-in-microsoft-office-outlook-allows) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-123381: Microsoft Office Outlook stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-123381-stack-based-buffer-overflow-in-microsoft-office-outlook-allows) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-123376: Microsoft Office Outlook heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-123376-heap-based-buffer-overflow-in-microsoft-office-outlook-allows-an) (high, CVSS 8.8, published 10 Nov 2026) ## Vulnerabilities per week 1 vulnerability in the last four weeks, level on the four before (1). | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 5 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 1 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 1 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 17 | 1 | 1 | ## Other Microsoft technologies - [Microsoft Windows](https://junglewise.ai/threats/technologies/windows): 2,362 vulnerabilities - [Microsoft Windows 10](https://junglewise.ai/threats/technologies/windows-10): 589 vulnerabilities - [Microsoft Windows 11 24h2](https://junglewise.ai/threats/technologies/windows-11-24h2): 565 vulnerabilities - [Microsoft Windows 11 25h2](https://junglewise.ai/threats/technologies/windows-11-25h2): 534 vulnerabilities - [Microsoft Windows Server 2025](https://junglewise.ai/threats/technologies/windows-server-2025): 534 vulnerabilities - [Microsoft Windows Server 2022](https://junglewise.ai/threats/technologies/windows-server-2022): 528 vulnerabilities - [Microsoft Windows Server 2019](https://junglewise.ai/threats/technologies/windows-server-2019): 521 vulnerabilities - [Microsoft Windows Server 2012](https://junglewise.ai/threats/technologies/windows-server-2012): 517 vulnerabilities - [Microsoft Windows 11](https://junglewise.ai/threats/technologies/windows-11): 494 vulnerabilities - [Microsoft Windows Server 2016](https://junglewise.ai/threats/technologies/windows-server-2016): 476 vulnerabilities - [Microsoft Windows 10 1809](https://junglewise.ai/threats/technologies/windows-10-1809): 380 vulnerabilities - [Microsoft Windows 10 21h2](https://junglewise.ai/threats/technologies/windows-10-21h2): 373 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Microsoft Office Outlook vulnerabilities", https://junglewise.ai/threats/technologies/office-outlook, 11 November 2026.