Office Online Server
265 CVEs tracked. 2 of them are in CISA KEV.
This hub aggregates every CVE we track for Office Online Server, a product in the enterprise software space. Use it to gauge the current risk picture and drill into individual advisories.
Office Online Server CVEs per month
| Month | CVEs |
|---|---|
| 2024-10 | 0 |
| 2024-11 | 1 |
| 2024-12 | 0 |
| 2025-01 | 2 |
| 2025-02 | 5 |
| 2025-03 | 3 |
| 2025-04 | 3 |
| 2025-05 | 8 |
| 2025-06 | 1 |
| 2025-07 | 3 |
| 2025-08 | 5 |
| 2025-09 | 6 |
| 2025-10 | 8 |
| 2025-11 | 6 |
| 2025-12 | 5 |
| 2026-01 | 3 |
| 2026-02 | 3 |
| 2026-03 | 4 |
| 2026-04 | 5 |
| 2026-05 | 3 |
| 2026-06 | 7 |
| 2026-07 | 38 |
| 2026-08 | 25 |
| 2026-09 | 4 |
Severity
How the 265 CVEs score on CVSS. Severity is not exploitation: KEV is counted above.
- Critical2
- High212
- Medium49
- Low2
Latest CVEs
The 15 most recently published vulnerabilities affecting Office Online Server.
- CVE-2026-81956Microsoft Excel Remote Code Execution Vulnerability7.8
- CVE-2026-81401Microsoft Excel Information Disclosure Vulnerability5.5
- CVE-2026-81390Microsoft Excel Information Disclosure Vulnerability5.5
- CVE-2026-81947Microsoft Excel Remote Code Execution Vulnerability7.8
- CVE-2026-68817Microsoft Excel Remote Code Execution Vulnerability7.8
- CVE-2026-68814Microsoft Excel Remote Code Execution Vulnerability7.8
- CVE-2026-68812Microsoft Excel Remote Code Execution Vulnerability7.8
- CVE-2026-68805Microsoft Excel Remote Code Execution Vulnerability7.8
- CVE-2026-68803Microsoft Excel Remote Code Execution Vulnerability7.8
- CVE-2026-68804Microsoft Excel Remote Code Execution Vulnerability7.8
- CVE-2026-68801Microsoft Excel Remote Code Execution Vulnerability7.8
- CVE-2026-68799Microsoft Excel Information Disclosure Vulnerability5.5
- CVE-2026-68797Microsoft Excel Information Disclosure Vulnerability5.5
- CVE-2026-70327Microsoft Excel Information Disclosure Vulnerability6.5
- CVE-2026-70328Microsoft Excel Information Disclosure Vulnerability6.5
Product grouping is registry-driven, with AI assist and human review. How it works