Patch tracker / KB5002885
KB5002885: Microsoft SharePoint Server 2019 Security Update (July 2026)
KB5002885 is a High security update for Microsoft SharePoint Server 2019, released 2026-07-14. It closes 22 CVEs with a maximum CVSS of 8.4. The most likely of them to be attacked is CVE-2026-55023, which FIRST.org rates at 77% probability of exploitation in the next 30 days.
Update summary
Fixes 22 CVEs. Most severe CVSS 8.4 (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 SharePoint Enterprise Server 2016 has shipped since this one: KB5002882 (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.
Microsoft documents 1 known issue with this update.
- Customers in multi-front-end SharePoint farms with Trusted Provider or Forms authentication may face repeated authentication prompts or multiple...
KB5002885 is a Security Update for SharePoint Server 2019, released in the July 2026 Patch Tuesday cycle where Microsoft addressed 622 CVEs total including 56 rated Critical. The per-update CVE detail is still provisional because MSRC has not yet published the specifics for this cycle, so exact fixed vulnerabilities and severity for this KB are not confirmed. No named zero-day is mapped to this update in the release document, which lowers the immediate emergency pressure but does not remove the need to patch an internet-adjacent server platform.
Do this: Inventory your SharePoint Server 2019 farm and stage KB5002885 in a test environment now so you are ready to deploy once Microsoft publishes the confirmed CVE detail for this cycle.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5002885
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5002885
- Released
- 2026-07-14
- Last changed
- 2026-07-14
- 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 KB5002885 is installed
Elevated PowerShell. No output means it is not installed.
Known issues, from Microsoft
Quoted from Microsoft's support article for KB5002885 (checked 2026-08-12). Verify against the article before acting.
Customers in multi-front-end SharePoint farms with Trusted Provider or Forms authentication may face repeated authentication prompts or multiple sign-ins. This should not impact customers who have configured farms with Windows authentication. As a mitigation, configuring sticky sessions on the reverse proxy will address the majority of scenarios. Microsoft is working on a fix in the subsequent product update. While disabling SessionCookieTransformProtectionEnabled may appear to work around the issue, Microsoft does not recommend it. This setting safeguards authentication and turning it off can expose the farm to security vulnerabilities.
When a workflow status link is selected, WrkStat.aspx displays the following error message:
The WorkflowInstanceID parameter is invalid.
To workaround this issue, see Workflow status links fail after installing the July 2026 CU.
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-2026-55045 | High | 8.4 | 77% | No |
| 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-2026-55125 | 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-2026-55026 | Medium | 6.2 | 77% | No |
| CVE-2026-55023 | Medium | 5.5 | 77% | No |
| CVE-2026-55027 | Medium | 5.5 | 77% | No |
| CVE-2026-55028 | Medium | 5.5 | 77% | No |
| CVE-2026-55035 | Medium | 5.5 | 77% | No |
| CVE-2026-55047 | Medium | 5.5 | 77% | No |
| CVE-2026-55050 | Medium | 5.5 | 77% | No |
| CVE-2026-55121 | Medium | 5.5 | 77% | No |
| CVE-2026-55124 | Medium | 5.5 | 77% | No |
| CVE-2026-55142 | Medium | 5.5 | 77% | No |
| CVE-2026-56192 | 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.