Microsoft Office Online Server
126 CVEs affecting Microsoft Office Online Server. Latest disclosed: 2026-07-14. Critical: 0, High: 110.
| CVE | Severity | Score | Published | Summary |
|---|---|---|---|---|
CVE-2020-1495 | High | 8.8 | 2020-08-17 | A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory. An attacker who successf… |
CVE-2019-1331 | High | 8.8 | 2019-10-10 | A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory, aka 'Microsoft Excel Rem… |
CVE-2026-26109 | High | 8.4 | 2026-03-10 | Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally. |
CVE-2025-59236 | High | 8.4 | 2025-10-14 | Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally. |
CVE-2025-49697 | High | 8.4 | 2025-07-08 | Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally. |
CVE-2025-21362 | High | 8.4 | 2025-01-14 | Microsoft Excel Remote Code Execution Vulnerability |
CVE-2025-21354 | High | 8.4 | 2025-01-14 | Microsoft Excel Remote Code Execution Vulnerability |
CVE-2026-44822 | High | 8.2 | 2026-06-09 | Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network. |
CVE-2026-55949 | High | 7.8 | 2026-07-14 | Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to execute code locally. |
CVE-2026-55947 | High | 7.8 | 2026-07-14 | Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally. |
CVE-2026-55141 | High | 7.8 | 2026-07-14 | Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally. |
CVE-2026-55137 | High | 7.8 | 2026-07-14 | Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally. |
CVE-2026-55136 | High | 7.8 | 2026-07-14 | Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally. |
CVE-2026-55131 | High | 7.8 | 2026-07-14 | Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally. |
CVE-2026-55058 | High | 7.8 | 2026-07-14 | Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally. |
CVE-2026-55053 | High | 7.8 | 2026-07-14 | Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally. |
CVE-2026-55048 | High | 7.8 | 2026-07-14 | Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code locally. |
CVE-2026-55044 | High | 7.8 | 2026-07-14 | Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally. |
CVE-2026-55041 | High | 7.8 | 2026-07-14 | Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally. |
CVE-2026-55039 | High | 7.8 | 2026-07-14 | Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally. |