How severe is CVE-2022-33648?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Microsoft Office Online Server

CVE-2022-33648

Microsoft Excel Remote Code Execution Vulnerability

Published 2022-08-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (55.6th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: +0.000

Affected products

Microsoft Office Online Server — versions 16.0.1
Microsoft Office Online Server

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2022-33648 (vendor-advisory)

Frequently asked questions

What is CVE-2022-33648?: CVE-2022-33648 is a high-severity vulnerability in Microsoft Office Online Server. CVSS score: 7.8/10. Published 2022-08-09.
How severe is CVE-2022-33648?: High severity. CVSS v3 base score is 7.8 out of 10.