Patch tracker / KB5002890
KB5002890: Microsoft Office 365 for Mac Security Update (July 2026)
KB5002890 is a High security update for Microsoft Office 365 for Mac, released 2026-07-14. It closes 12 CVEs with a maximum CVSS of 7.8. The most likely of them to be attacked is CVE-2026-55050, which FIRST.org rates at 77% probability of exploitation in the next 30 days.
Update summary
Fixes 12 CVEs. Most severe CVSS 7.8 (High). EPSS exploit probability up to <1%. Among the lower half of tracked Microsoft updates by EPSS exploit probability.
A newer security update for Microsoft Office 365 for Mac has shipped since this one: KB5002884 (2026-08-11). For cumulative update families the newer package includes these fixes, so installing that one is usually the shorter path. Verify against your own update rings before you skip this package.
We checked Microsoft's support article for KB5002890 on 2026-08-12 and it lists no known issues. Read the article before broad deployment; Microsoft adds issues as reports come in, and we re-check on every refresh.
KB5002890 is a Security Update for Microsoft Word 2016 in both 32-bit and 64-bit editions, shipped in the July 2026 Patch Tuesday cycle. The per-update CVE detail is still provisional and Microsoft has not published it yet, but the MSRC release document maps no named zero-days to this update, which lowers the pressure for same-day action. Anyone running Word 2016 as a document handler for external files is the exposed population, since Word patches typically address parsing of attacker-supplied files.
Do this: Stage KB5002890 to a Word 2016 test group now and hold broad deployment until Microsoft publishes the per-update CVE detail to confirm severity.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5002890
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5002890
- Released
- 2026-07-14
- Last changed
- 2026-07-30
- Changes tracked
- 2
Senserva began recording day-to-day change history on 2026-07-07, and refreshes it several times a day. Release dates are historical where Microsoft publishes them; revision history is tracked from that date forward, so it does not include changes made before then.
Check if KB5002890 is installed
Elevated PowerShell. No output means it is not installed.
CVEs fixed by this update
Sorted exploited-first, then by CVSS. Every CVE links to its Senserva page with the full risk facts, references, and a ready-to-paste AI prompt.
| CVE | Severity | CVSS | EPSS | Exploited |
|---|---|---|---|---|
| CVE-2026-55032 | High | 7.8 | 77% | No |
| CVE-2026-55033 | High | 7.8 | 77% | No |
| CVE-2026-55038 | High | 7.8 | 77% | No |
| CVE-2026-55055 | High | 7.8 | 77% | No |
| CVE-2026-55127 | High | 7.8 | 77% | No |
| CVE-2026-55128 | High | 7.8 | 77% | No |
| CVE-2026-55130 | High | 7.8 | 77% | No |
| CVE-2026-55132 | High | 7.8 | 77% | No |
| CVE-2026-55134 | High | 7.8 | 77% | No |
| CVE-2026-55050 | Medium | 5.5 | 77% | No |
| CVE-2026-55124 | Medium | 5.5 | 77% | No |
| CVE-2026-55142 | Medium | 5.5 | 77% | No |
Scope and sources
- Affected products
- Also released in July 2026
KB5099444
185 CVEs · Critical · exploitedKB5099445
174 CVEs · Critical · exploitedKB5099535
261 CVEs · Critical · exploitedKB5099536
389 CVEs · Critical · exploitedKB5099538
312 CVEs · Critical · exploitedKB5099539
314 CVEs · Critical · exploitedKB5099540
326 CVEs · Critical · exploitedKB5101649
383 CVEs · Critical · exploitedThe full month, summarized: Microsoft Patch Tuesday.
- Authoritative references
See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.