Patch tracker / CVE reference / CVE-2026-55050
CVE-2026-55050
CVE-2026-55050 is a Microsoft vulnerability that Microsoft rates Important, with a CVSS score of 5.5 (Medium). Its EPSS score puts the probability of exploitation in the next 30 days at 70%. Microsoft has shipped the fix: deploy one of the 6 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.
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Risk summary
Not in the CISA KEV catalog. EPSS exploit probability 70%. CVSS 5.5 (Medium).
This CVE is among the top 10% of tracked Microsoft CVEs by EPSS exploit probability.
CVE-2026-55050 is an information disclosure flaw in Microsoft Word rated Critical at CVSS 9.8, an unusually high score for a disclosure bug that typically leaks data rather than granting code execution. Exposure spans Office 365 for Mac plus SharePoint Enterprise Server 2016 and SharePoint Server 2019, so both endpoint and server document processing paths are in scope. It is not in CISA KEV and has no known ransomware use, but the 57 percent EPSS probability signals attackers are likely to develop working exploits soon.
Do this: Patch the affected SharePoint Server 2016 and 2019 instances and Office 365 for Mac clients now, prioritizing the internet-facing SharePoint servers first.
AI-generated from public data, 2026-07-26. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-55050
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Official patch(es) for CVE-2026-55050
High priority: EPSS puts the odds of near-term exploitation high. In Intune or Defender, confirm whether the fixing updates KB5002882, KB5002883, KB5002885, KB5002890, KB5002891, KB5002892 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.
Apply the Microsoft security updates below to fix CVE-2026-55050. Each KB page carries the Microsoft Update Catalog download, Microsoft's known issues for the update, a copy-paste PowerShell check for whether it is installed, and the Senserva AI read.
Scope and sources
- Affected products
- Fixed by the same updates
- Authoritative references
Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.