Patch tracker / CVE reference / CVE-2026-20846
CVE-2026-20846
High severity Microsoft vulnerability, CVSS 8.8. Fixed by 14 Microsoft security updates.
All about CVE-2026-20846: the Senserva AI read, whether it is exploited, the official patches, its change history, and the questions admins ask.
Which of your devices are still exposed? Find out free with a full Microsoft 365 audit.
CVE-2026-20846 is a high severity Microsoft vulnerability with a CVSS score of 8.8. 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
Senserva AI Opinion for CVE-2026-20846
A GDI+ denial of service flaw rated High Severity at CVSS 8.8 with a 26 percent exploit probability, affecting the new Windows 11 26H1 builds and Windows 10 1809. Since GDI+ renders images everywhere from Explorer thumbnails to document previews, a crafted image can crash the consuming application without the user doing anything deliberate. The spread from newest to oldest supported builds shows the bug has been in the codebase a long time.
Do this: Push the update broadly across desktops, covering both the Windows 11 26H1 early adopters and the Windows 10 1809 stragglers.
AI-generated from public data, 2026-07-07. 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.
Full tracking and change history for CVE-2026-20846
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
Exploitation and severity
Not in the CISA KEV catalog. EPSS exploit probability 26%. CVSS 8.8 (High).
This CVE is among the lower half of tracked Microsoft CVEs by EPSS exploit probability.
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 links to the Microsoft Update Catalog download for every affected product.
Affected products
Common questions about CVE-2026-20846
Is CVE-2026-20846 actively exploited?
It is not currently listed in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score puts the probability of exploitation in the next 30 days at 26%.
What patch fixes CVE-2026-20846?
Microsoft fixed CVE-2026-20846 in KB5075897, KB5075899, KB5075904, KB5075906, KB5075912, KB5075941, KB5075942, KB5075943, KB5075970, KB5075971, KB5075999, KB5077179, KB5077181, KB5077212. Download from the Microsoft Update Catalog, or let Intune, Windows Update, or WSUS deliver it.
Which products are affected by CVE-2026-20846?
Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019.
Can I ask my own AI about CVE-2026-20846?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2026-20846's key facts: severity, CVSS, EPSS exploit probability, CISA KEV status, and the fixing KB. Copy it into Claude, ChatGPT, or Copilot for a triage plan; the data is refreshed three times a day (5 AM, 12:30 PM, and 7 PM US Central).
Fixed by the same updates
If you are patching CVE-2026-20846, the same updates also fix these:
Authoritative references
Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.
