Technology · Microsoft
Microsoft Office 365 for Mac vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 64 vulnerabilities in Microsoft Office 365 for Mac: 0 in the last 7 days and 64 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-56195, was published on 14 July 2026.
- Last 7 days
- 0
- Last 90 days
- 64
- Critical, all time
- 0
- Exploited in the wild
- 0
About Microsoft Office 365 for Mac
A suite of productivity applications including Word, Excel, and PowerPoint designed for macOS.
Latest Microsoft Office 365 for Mac vulnerabilities
- CVE-2026-56195: Microsoft Office out-of-bounds read information disclosuremediumCVSS 5.5
- CVE-2026-56192: Microsoft Office Out-of-bounds Read Information DisclosuremediumCVSS 5.5
- CVE-2026-56156: Microsoft Office Excel heap buffer overflowhighCVSS 7.8
- CVE-2026-55949: Microsoft Excel use of uninitialized resource code executionhighCVSS 7.8
- CVE-2026-55947: Microsoft Office Excel heap buffer overflowhighCVSS 7.8
- CVE-2026-55898: Microsoft Office Excel out-of-bounds readmediumCVSS 6.1
- CVE-2026-55142: Microsoft Office Word numeric truncation information disclosuremediumCVSS 5.5
- CVE-2026-55141: Microsoft Office Excel stack-based buffer overflowhighCVSS 7.8
- CVE-2026-55140: Microsoft Office heap buffer overflowhighCVSS 7.8
- CVE-2026-55139: Microsoft Office out-of-bounds readmediumCVSS 5.5
- CVE-2026-55138: Microsoft Excel untrusted pointer dereference information disclosuremediumCVSS 5.5
- CVE-2026-55137: Microsoft Office Excel heap buffer overflowhighCVSS 7.8
- CVE-2026-55133: Microsoft Office OneNote heap overflow code executionhighCVSS 7.8
- CVE-2026-55132: Microsoft Office Word double free local code executionhighCVSS 7.8
- CVE-2026-55131: Microsoft Excel heap buffer overflow code executionhighCVSS 7.8
- CVE-2026-55129: Microsoft Office heap overflow remote code executionhighCVSS 7.8
- CVE-2026-55125: Microsoft Office heap overflow in code executionhighCVSS 7.8
- CVE-2026-55123: Microsoft PowerPoint heap overflow in numeric type conversionhighCVSS 7.8
- CVE-2026-55122: Microsoft Excel out-of-bounds read information disclosurehighCVSS 7.1
- CVE-2026-55121: Microsoft Office out-of-bounds read information disclosuremediumCVSS 5.5
- CVE-2026-55120: Microsoft PowerPoint heap overflow code executionhighCVSS 7.8
- CVE-2026-55058: Microsoft Excel out-of-bounds read code executionhighCVSS 7.8
- CVE-2026-55057: Microsoft Office integer overflow information disclosuremediumCVSS 5.5
- CVE-2026-55056: Microsoft Office heap buffer overflowhighCVSS 7.8
- CVE-2026-55054: Microsoft Excel out-of-bounds read information disclosuremediumCVSS 6.5
Most severe Microsoft Office 365 for Mac vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-55045: Microsoft Office out-of-bounds read code executionhighCVSS 8.4
- CVE-2026-56156: Microsoft Office Excel heap buffer overflowhighCVSS 7.8
- CVE-2026-55949: Microsoft Excel use of uninitialized resource code executionhighCVSS 7.8
- CVE-2026-55947: Microsoft Office Excel heap buffer overflowhighCVSS 7.8
- CVE-2026-55141: Microsoft Office Excel stack-based buffer overflowhighCVSS 7.8
- CVE-2026-55140: Microsoft Office heap buffer overflowhighCVSS 7.8
- CVE-2026-55137: Microsoft Office Excel heap buffer overflowhighCVSS 7.8
- CVE-2026-55133: Microsoft Office OneNote heap overflow code executionhighCVSS 7.8
- CVE-2026-55132: Microsoft Office Word double free local code executionhighCVSS 7.8
- CVE-2026-55131: Microsoft Excel heap buffer overflow code executionhighCVSS 7.8
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 | 64 | 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/office-365-for-mac.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 365 for Mac vulnerabilities", https://junglewise.ai/threats/technologies/office-365-for-mac, 26 September 2026.