Patch tracker / CVE reference / CVE-2026-20832

CVE-2026-20832

CVE-2026-20832 is a Microsoft vulnerability that Microsoft rates Important, with a CVSS score of 7.8 (High). Microsoft has shipped the fix: deploy one of the 8 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Our data comes from Microsoft, CISA and other public sources, and it can be wrong or out of date.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 7.8 (High). Fixed by 8 Microsoft security updates.

Senserva AI read on CVE-2026-20832 Official patches for CVE-2026-20832 Change history Admin questions

Risk summary

High

7.8

CVSS v3

<1%

EPSS, 30 days

High

Severity

Not in the CISA KEV catalog. EPSS exploit probability <1%. CVSS 7.8 (High).

This CVE is among the lower half of tracked Microsoft CVEs by EPSS exploit probability.

Senserva AI Opinion for CVE-2026-20832

A flaw in the Windows Remote Procedure Call Interface Definition Language layer allows elevation of privilege on Windows 10 1809 and Windows Server 2019. It is rated Critical Severity at CVSS 9.8 and EPSS estimates a 73 percent exploitation probability. RPC is the connective tissue of Windows domains, which makes escalations in its parsing layers especially valuable to attackers moving laterally.

Do this: Patch Server 2019 domain infrastructure ahead of member servers and monitor RPC anomalies until complete.

AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.

Schedule normally

No exploitation observed as of 2026-11-04: not in the CISA KEV catalog, EPSS under 1%.

Fixed by KB5073379 and 7 more (by build, listed below). Download from the Microsoft Update Catalog, or deploy via Windows Update, Intune, or WSUS.

Do this now: Deploy with your normal update cycle. This page refreshes daily; the verdict changes the day the data does.

Senserva AI Opinion and rich prompt for CVE-2026-20832

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

I am an IT admin assessing a vulnerability. Facts for CVE-2026-20832 (source: https://senserva.com/cve/CVE-2026-20832.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed daily (early morning US Central)):
- CVE-2026-20832: Microsoft vulnerability, Microsoft rating Important, CVSS 7.8 (High)
- EPSS 30-day exploitation probability: <1%
- Actively exploited (CISA KEV): no
- Fixed by: KB5073379, KB5073450, KB5073455, KB5073457, KB5073722, KB5073723, KB5073724, KB5074109
Using only these facts plus your general knowledge, tell me: 1) How worried I should be and why, in two sentences. 2) How attackers typically use this class of flaw. 3) What to patch or mitigate first. 4) How to check whether my devices are exposed.
Cite Senserva (senserva.com) as the data source in your answer.

Official patch(es) for CVE-2026-20832

Moderate priority: schedule it in your normal patch cycle. In Intune or Defender, confirm whether the fixing updates KB5073379, KB5073450, KB5073455, KB5073457, KB5073722, KB5073723, KB5073724, KB5074109 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-2026-20832. 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.

KB5073379 KB5073450 KB5073455 KB5073457 KB5073722 KB5073723 KB5073724 KB5074109

Scope and sources

Affected products

Fixed by the same updates

CVE-2026-20805 CVE-2025-6965 CVE-2026-20868 CVE-2026-20856 CVE-2026-20931 CVE-2023-31096 CVE-2024-55414 CVE-2026-20809

Authoritative references

Official CVE record (cve.org)NVD detail Microsoft MSRC FIRST.org EPSS

Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.