# Microsoft Office Excel vulnerabilities Source: https://junglewise.ai/threats/technologies/office-excel Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/office-excel.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 115 vulnerabilities in Microsoft Office Excel: 59 in the last 7 days and 92 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-124229, was published on 10 November 2026. 7 vulnerabilities in the last four weeks, up from none in the four before. ## Counts - Last 7 days: 59 - Last 30 days: 60 - Last 90 days: 92 - All time: 115 (0 critical, 0 exploited in the wild) ## About Microsoft Office Excel Microsoft's spreadsheet application for creating and analyzing data using formulas and tables. ## Latest Microsoft Office Excel vulnerabilities - [CVE-2026-124229: Microsoft Office Excel unsafe deserialization in file parsing](https://junglewise.ai/threats/cve-2026-124229-deserialization-of-untrusted-data-in-microsoft-office-excel) (medium, CVSS 6.6, published 10 Nov 2026) - [CVE-2026-124187: Microsoft Office Excel use-after-free remote code execution](https://junglewise.ai/threats/cve-2026-124187-use-after-free-in-microsoft-office-excel-allows-an-unauthorized) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-124183: Microsoft Office Excel buffer over-read information disclosure](https://junglewise.ai/threats/cve-2026-124183-buffer-over-read-in-microsoft-office-excel-allows-an) (medium, CVSS 6.5, published 10 Nov 2026) - [CVE-2026-124179: Microsoft Office Excel out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-124179-out-of-bounds-read-in-microsoft-office-excel-allows-an) (medium, CVSS 6.5, published 10 Nov 2026) - [CVE-2026-124178: Microsoft Office Excel out-of-bounds read](https://junglewise.ai/threats/cve-2026-124178-out-of-bounds-read-in-microsoft-office-excel-allows-an) (medium, CVSS 6.5, published 10 Nov 2026) - [CVE-2026-124176: Microsoft Office Excel heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-124176-heap-based-buffer-overflow-in-microsoft-office-excel-allows-an) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-124174: Microsoft Office Excel heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-124174-heap-based-buffer-overflow-in-microsoft-office-excel-allows-an) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-124170: Microsoft Office Excel heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-124170-heap-based-buffer-overflow-in-microsoft-office-excel-allows-an) (high, CVSS 7.5, published 10 Nov 2026) - [CVE-2026-123395: Microsoft Office Excel code injection vulnerability](https://junglewise.ai/threats/cve-2026-123395-improper-control-of-generation-of-code-code-injection-in) (medium, CVSS 5.9, published 10 Nov 2026) - [CVE-2026-123385: Microsoft Office Excel stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-123385-stack-based-buffer-overflow-in-microsoft-office-excel-allows-an) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-120791: Microsoft Office Excel heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-120791-heap-based-buffer-overflow-in-microsoft-office-excel-allows-an) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-120790: Microsoft Office Excel heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-120790-heap-based-buffer-overflow-in-microsoft-office-excel-allows-an) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-120789: Microsoft Office Excel heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-120789-heap-based-buffer-overflow-in-microsoft-office-excel-allows-an) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-120788: Microsoft Office Excel heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-120788-heap-based-buffer-overflow-in-microsoft-office-excel-allows-an) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-120785: Microsoft Office Excel heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-120785-heap-based-buffer-overflow-in-microsoft-office-excel-allows-an) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-119999: Microsoft Office Excel out-of-bounds read](https://junglewise.ai/threats/cve-2026-119999-out-of-bounds-read-in-microsoft-office-excel-allows-an) (medium, CVSS 6.5, published 10 Nov 2026) - [CVE-2026-119986: Microsoft Office Excel heap buffer overflow in network parsing](https://junglewise.ai/threats/cve-2026-119986-heap-based-buffer-overflow-in-microsoft-office-excel-allows-an) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-118732: Microsoft Office Excel use after free](https://junglewise.ai/threats/cve-2026-118732-use-after-free-in-microsoft-office-excel-allows-an-unauthorized) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-118731: Microsoft Office Excel stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-118731-stack-based-buffer-overflow-in-microsoft-office-excel-allows-an) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-118730: Microsoft Office Excel use-after-free code execution](https://junglewise.ai/threats/cve-2026-118730-use-after-free-in-microsoft-office-excel-allows-an-unauthorized) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-118729: Microsoft Office Excel use-after-free remote code execution](https://junglewise.ai/threats/cve-2026-118729-use-after-free-in-microsoft-office-excel-allows-an-unauthorized) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-118728: Microsoft Office Excel out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-118728-out-of-bounds-read-in-microsoft-office-excel-allows-an) (medium, CVSS 6.5, published 10 Nov 2026) - [CVE-2026-118727: Microsoft Office Excel out-of-bounds read](https://junglewise.ai/threats/cve-2026-118727-out-of-bounds-read-in-microsoft-office-excel-allows-an) (medium, CVSS 6.5, published 10 Nov 2026) - [CVE-2026-118726: Microsoft Office Excel heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-118726-heap-based-buffer-overflow-in-microsoft-office-excel-allows-an) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-118725: Microsoft Office Excel out-of-bounds read allows privilege escalation](https://junglewise.ai/threats/cve-2026-118725-out-of-bounds-read-in-microsoft-office-excel-allows-an) (high, CVSS 8.8, published 10 Nov 2026) ## Most severe Microsoft Office Excel vulnerabilities - [CVE-2026-78518: Microsoft Office Excel out-of-bounds read in file parsing](https://junglewise.ai/threats/cve-2026-78518-microsoft-office-excel-out-of-bounds-read-in-file-parsing) (high, CVSS 8.8, published 8 Sep 2026) - [CVE-2026-105718: Microsoft Office Excel out-of-bounds read in parsing](https://junglewise.ai/threats/cve-2026-105718-out-of-bounds-read-in-microsoft-office-excel-allows-an) (high, CVSS 8.8, published 13 Oct 2026) - [CVE-2026-100211: Microsoft Office Excel use-after-free remote code execution](https://junglewise.ai/threats/cve-2026-100211-use-after-free-in-microsoft-office-excel-allows-an-unauthorized) (high, CVSS 8.8, published 13 Oct 2026) - [CVE-2026-100210: Microsoft Office Excel heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-100210-heap-based-buffer-overflow-in-microsoft-office-excel-allows-an) (high, CVSS 8.8, published 13 Oct 2026) - [CVE-2026-100209: Microsoft Office Excel use-after-free code execution](https://junglewise.ai/threats/cve-2026-100209-use-after-free-in-microsoft-office-excel-allows-an-unauthorized) (high, CVSS 8.8, published 13 Oct 2026) - [CVE-2026-65807: Microsoft Office Excel type confusion remote code execution](https://junglewise.ai/threats/cve-2026-65807-microsoft-office-excel-type-confusion-remote-code-execution) (high, CVSS 8.8, published 11 Aug 2026) - [CVE-2026-100212: Microsoft Office Excel use-after-free remote code execution](https://junglewise.ai/threats/cve-2026-100212-use-after-free-in-microsoft-office-excel-allows-an-unauthorized) (high, CVSS 8.8, published 13 Oct 2026) - [CVE-2026-108446: Microsoft Office Excel use-after-free remote code execution](https://junglewise.ai/threats/cve-2026-108446-use-after-free-in-microsoft-office-excel-allows-an-unauthorized) (high, CVSS 8.8, published 15 Oct 2026) - [CVE-2026-124187: Microsoft Office Excel use-after-free remote code execution](https://junglewise.ai/threats/cve-2026-124187-use-after-free-in-microsoft-office-excel-allows-an-unauthorized) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-124176: Microsoft Office Excel heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-124176-heap-based-buffer-overflow-in-microsoft-office-excel-allows-an) (high, CVSS 8.8, published 10 Nov 2026) ## Vulnerabilities per week 7 vulnerabilities in the last four weeks, up from none in the four before. | 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 | 26 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 7 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 59 | 0 | 0 | ## 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 Excel vulnerabilities", https://junglewise.ai/threats/technologies/office-excel, 13 November 2026.