Technology · Microsoft
Microsoft Office LTSC for Mac 2021 vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 45 vulnerabilities in Microsoft Office LTSC for Mac 2021: 0 in the last 7 days and 41 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
- 41
- Critical, all time
- 0
- Exploited in the wild
- 0
About Microsoft Office LTSC for Mac 2021
A version of the Microsoft Office productivity suite designed for macOS and sold via a perpetual license.
Latest Microsoft Office LTSC for Mac 2021 vulnerabilities
- CVE-2026-56195: 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-2026-55898: Microsoft Office Excel out-of-bounds readmediumCVSS 6.1
- 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-2026-55123: Microsoft PowerPoint heap overflow in numeric type conversionhighCVSS 7.8
- CVE-2026-55120: Microsoft PowerPoint heap overflow 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
- CVE-2026-55053: Microsoft Excel heap buffer overflow code executionhighCVSS 7.8
- CVE-2026-55050: Microsoft Office Word out-of-bounds read information disclosuremediumCVSS 5.5
- CVE-2026-55049: Microsoft Office heap buffer overflow code executionhighCVSS 7.8
- CVE-2026-55048: Microsoft Excel integer overflow local code executionhighCVSS 7.8
- CVE-2026-55044: Microsoft Office Excel out-of-bounds read code executionhighCVSS 7.8
- CVE-2026-55043: Microsoft PowerPoint heap overflow remote code executionhighCVSS 7.8
- CVE-2026-55042: Microsoft Office information disclosure via uninitialized resourcemediumCVSS 5.5
- CVE-2026-55041: Microsoft Excel heap buffer overflow code executionhighCVSS 7.8
- CVE-2026-55039: Microsoft Office Excel integer underflow code executionhighCVSS 7.8
- CVE-2026-55037: Microsoft Office Excel heap buffer overflowhighCVSS 7.8
Most severe Microsoft Office LTSC for Mac 2021 vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-33115: Microsoft Office Word use after free code executionhighCVSS 8.4EPSS 0.3%
- CVE-2026-33114: Microsoft Office Word untrusted pointer dereferencehighCVSS 8.4EPSS 0.3%
- CVE-2026-33095: Microsoft Office Word use after free code executionhighCVSS 7.8EPSS 0.4%
- 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-2026-55140: 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-2026-55123: Microsoft PowerPoint heap overflow in numeric type conversionhighCVSS 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 | 41 | 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-ltsc-for-mac-2021.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 LTSC for Mac 2021 vulnerabilities", https://junglewise.ai/threats/technologies/office-ltsc-for-mac-2021, 26 September 2026.