Patch tracker / CVE reference / CVE-2026-20943
CVE-2026-20943
CVE-2026-20943 is a Microsoft vulnerability that Microsoft rates Important, with a CVSS score of 7.0 (High). Microsoft has shipped the fix: deploy one of the 4 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.
Our data comes from Microsoft, CISA and other public sources, and it can be wrong or out of date. If you are unsure, check the linked source before you act, and tell us when we are wrong so we can fix it.
Microsoft rates it Important. CVSS 7.0 (High). Fixed by 4 Microsoft security updates.
Risk summary
Not in the CISA KEV catalog. EPSS exploit probability <1%. CVSS 7.0 (High).
This CVE is among the top half of tracked Microsoft CVEs by EPSS exploit probability.
Unlike most of the entries in this batch, which are local privilege escalation bugs, this is a Remote Code Execution flaw in Office's Click-To-Run update mechanism, rated Critical at 9.8 with a 31 percent EPSS score, and it reaches SharePoint Server 2019 as well as Office 2016 in both 32-bit and 64-bit editions. RCE in an update-delivery component is especially serious because it can be triggered without the same local-access prerequisite that most of the other CVEs here require. No confirmed KEV or ransomware use yet.
Do this: Patch SharePoint Server 2019 and any remaining Office 2016 installs first among the Office fixes in this release, given this is remote code execution rather than local escalation.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-20943
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Official patch(es) for CVE-2026-20943
Moderate priority: schedule it in your normal patch cycle. In Intune or Defender, confirm whether the fixing updates KB5002822, KB5002825, KB5002826, KB5002828 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-2026-20943. 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.