OO
Product
Office Online Server
On CISA KEVExploited in the wild
305
CVEs
1
On KEV
9.8
Max CVSS
44
New 30D
Severity mix
Critical 2High 249Medium 52Low 2
Watch
Add Office Online Server to your stack to get only the CVEs that touch what you run.
| CVE | CVSS | Published | Summary · affected versions |
|---|---|---|---|
| CVE-2021-34451 | 5.3 | Jul 16 | Microsoft Office Online Server Spoofing Vulnerability Affected: All versions, or not specified |
| CVE-2026-45455 | 4.3 | Jun 9 | Microsoft Excel Information Disclosure Vulnerability Affected: 16.0.0.0 before 16.0.10417.20137 |