Patch tracker / CVE reference / CVE-2026-20846
CVE-2026-20846
CVE-2026-20846 is a high severity Microsoft vulnerability with a CVSS score of 7.5. Its EPSS score puts the probability of exploitation in the next 30 days at 26%. Microsoft has shipped the fix: deploy one of the 14 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.
Risk summary
Not in the CISA KEV catalog. EPSS exploit probability 26%. CVSS 7.5 (High).
This CVE is among the lower half of tracked Microsoft CVEs by EPSS exploit probability.
Despite the GDI+ Denial of Service title, this carries a High Severity CVSS of 8.8, which is unusually elevated for a pure DoS and points to an attacker-triggerable code path in the graphics subsystem. Exposure spans both new Windows 11 version 26H1 builds (ARM64 and x64) and the older Windows 10 Version 1809 32-bit, so it crosses your newest and legacy fleets at once. The 26% EPSS probability is notable given there is no confirmed exploitation in CISA KEV and no known ransomware use yet.
Do this: Deploy the Microsoft patch to Windows 11 26H1 ARM64 and x64 hosts and any remaining Windows 10 1809 32-bit systems, prioritizing machines that process untrusted image files.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-20846
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Official patch(es) for CVE-2026-20846
Elevated priority: high severity or a meaningful exploitation probability, sooner if an affected product is internet-facing. In Intune or Defender, confirm whether the fixing updates KB5075897, KB5075899, KB5075904, KB5075906, KB5075912, KB5075941, KB5075942, KB5075943, KB5075970, KB5075971, KB5075999, KB5077179, KB5077181, KB5077212 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-2026-20846. 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.