Patch tracker / CVE reference / CVE-2026-45461

CVE-2026-45461

CVE-2026-45461 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

High

8.4

CVSS

<1%

EPSS, 30 days

High

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.

Senserva AI Opinion for CVE-2026-45461

CVE-2026-45461 is a High severity (CVSS 8.4) remote code execution flaw spanning an unusual mix of Office builds: Office for Android, Office 365 for Mac, and Office 2019 32-bit on Windows. The cross-platform spread means your mobile users and Mac users are in scope alongside traditional Windows desktops. That said, EPSS exploit probability sits at 0 percent, it is not in CISA KEV, and there is no known ransomware use, so this is a patch-on-schedule item rather than an emergency.

Do this: Inventory which of the three affected platforms (Office for Android, Office 365 for Mac, Office 2019 32-bit) you run and push the Microsoft update to each in your next patch cycle.

AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2026-45461

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-2026-45461 (source: https://senserva.com/cve/CVE-2026-45461.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- CVE-2026-45461: High severity Microsoft vulnerability, CVSS 8.4
- EPSS 30-day exploitation probability: <1%
- Actively exploited (CISA KEV): no
- Fixed by: KB5002878
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.

Schedule normally

No exploitation observed: not in the CISA KEV catalog, EPSS under 1%.

Fixed by KB5002878. 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.

Official patch(es) for CVE-2026-45461

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-2026-45461. 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.

KB5002878

Scope and sources

Affected products

Fixed by the same update

CVE-2026-44819 CVE-2026-44821 CVE-2026-44824 CVE-2026-45475 CVE-2026-45485 CVE-2026-45463 CVE-2026-45472 CVE-2026-45474

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.