Patch tracker / KB5002341
KB5002341: Office Online Server Security Update (October 2025)
KB5002341 is a High security update for Office Online Server, released 2025-10-14. It closes 2 CVEs with a maximum CVSS of 7.1. It is the 26th largest of the 60 updates Microsoft shipped that month, by CVEs closed.
Update summary
Fixes 2 CVEs. Most severe CVSS 7.1 (High). EPSS exploit probability up to <1%. Among the lower half of tracked Microsoft updates by EPSS exploit probability.
A newer security update for Office Online Server 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.
KB5002341 patches two vulnerabilities (CVE-2025-59235 and CVE-2025-59232) across SharePoint Enterprise Server 2016, SharePoint Server 2019, and Office Online Server, with a top rating of High severity at CVSS 7.1. On-premises SharePoint farms and connected Office Online Server instances are exposed, though neither CVE is in CISA KEV and EPSS sits at 1 percent, so active exploitation is not currently indicated. The concern is that SharePoint servers are frequent targets once a proof of concept appears, and this update spans three related products that are often patched together.
Do this: Schedule this update across your SharePoint 2016, SharePoint 2019, and Office Online Server instances, and confirm any required post-patch steps like PSConfig are completed on each farm.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5002341
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5002341
- Released
- 2025-10-14
- Last changed
- 2025-10-14
- Changes tracked
- 1
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 KB5002341 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-2025-59232 | High | 7.1 | 2.3% | No |
| CVE-2025-59235 | High | 7.1 | 2.3% | No |
Scope and sources
- Affected products
- Also released in October 2025
KB5070879
1 CVE · Critical · exploitedKB5070881
1 CVE · Critical · exploitedKB5070882
1 CVE · Critical · exploitedKB5070883
1 CVE · Critical · exploitedKB5070884
1 CVE · Critical · exploitedKB5070886
1 CVE · Critical · exploitedKB5070887
1 CVE · Critical · exploitedKB5070892
1 CVE · 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.