Patch tracker / CVE reference / CVE-2026-45474
CVE-2026-45474
Updated July 21, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
High severity Microsoft vulnerability, CVSS 8.4. Fixed by 1 Microsoft security update.
All about CVE-2026-45474: the Senserva AI read, whether it is exploited, the official patches, its change history, and the questions admins ask.
CVE-2026-45474 is a high severity Microsoft vulnerability with a CVSS score of 8.4. Microsoft has shipped the fix: deploy the update below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.
Risk summary
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Senserva AI Opinion for CVE-2026-45474
Mac users are in scope for this one: Microsoft Office 365 for Mac joins Office 2019 on the affected list for this document-parsing remote code execution flaw. Mac fleets often sit outside Windows-centric patch tooling, which is the practical gap to check. EPSS is 0 percent, so there is time to do it properly.
Do this: Confirm Microsoft AutoUpdate is delivering current Office builds on your managed Macs.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-45474
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2026-45474
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 <1%. CVSS 8.4 (High).
This CVE is among the lower half of tracked Microsoft CVEs by EPSS exploit probability.
Official patch(es) for CVE-2026-45474
Moderate priority: schedule it in your normal patch cycle. In Intune or Defender, confirm whether the fixing update KB5002878 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.
Apply the Microsoft security update below to fix CVE-2026-45474. 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.
Affected products
Common questions about CVE-2026-45474
Is CVE-2026-45474 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 <1%.
What patch fixes CVE-2026-45474?
Microsoft fixed CVE-2026-45474 in KB5002878. Download from the Microsoft Update Catalog, or let Intune, Windows Update, or WSUS deliver it.
Which products are affected by CVE-2026-45474?
Microsoft Office 365 for Mac, Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019.
Can I ask my own AI about CVE-2026-45474?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2026-45474'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 update
If you are patching CVE-2026-45474, the same update also fixes these:
Authoritative references
Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.
