Microsoft 365 Apps
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By the Year
In 2026 there have been 10 vulnerabilities in Microsoft 365 Apps with an average score of 8.0 out of ten. Last year, in 2025 365 Apps had 152 security vulnerabilities published. If vulnerabilities keep coming in at the current rate, it appears that number of security vulnerabilities in 365 Apps in 2026 could surpass last years number. However, the average CVE base score of the vulnerabilities in 2026 is greater by 0.26.
| Year | Vulnerabilities | Average Score |
|---|---|---|
| 2026 | 10 | 7.98 |
| 2025 | 152 | 7.72 |
| 2024 | 42 | 7.69 |
| 2023 | 55 | 7.36 |
| 2022 | 46 | 7.26 |
| 2021 | 64 | 7.45 |
| 2020 | 50 | 7.30 |
It may take a day or so for new 365 Apps vulnerabilities to show up in the stats or in the list of recent security vulnerabilities. Additionally vulnerabilities may be tagged under a different product or component name.
Recent Microsoft 365 Apps Security Vulnerabilities
Jan 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-20957
7.8 - High
- January 13, 2026
Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Integer underflow
Jan 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-20950
7.8 - High
- January 13, 2026
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Dangling pointer
Jan 2026: Microsoft Office Remote Code Execution Vulnerability
CVE-2026-20952
8.4 - High
- January 13, 2026
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
Dangling pointer
Jan 2026: Microsoft Word Remote Code Execution Vulnerability
CVE-2026-20948
7.8 - High
- January 13, 2026
Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Untrusted Pointer Dereference
Jan 2026: Microsoft Excel Security Feature Bypass Vulnerability
CVE-2026-20949
7.8 - High
- January 13, 2026
Improper access control in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.
Authorization
Jan 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-20956
7.8 - High
- January 13, 2026
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Untrusted Pointer Dereference
Jan 2026: Microsoft Office Remote Code Execution Vulnerability
CVE-2026-20953
8.4 - High
- January 13, 2026
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
Dangling pointer
Jan 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-20955
7.8 - High
- January 13, 2026
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Untrusted Pointer Dereference
Jan 2026: Microsoft Word Remote Code Execution Vulnerability
CVE-2026-20944
8.4 - High
- January 13, 2026
Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Out-of-bounds Read
Jan 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-20946
7.8 - High
- January 13, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Out-of-bounds Read
Dec 2025: Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-62560
7.8 - High
- December 09, 2025
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Untrusted Pointer Dereference
Dec 2025: Microsoft Word Remote Code Execution Vulnerability
CVE-2025-62559
7.8 - High
- December 09, 2025
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Dangling pointer
Dec 2025: Microsoft Word Remote Code Execution Vulnerability
CVE-2025-62558
7.8 - High
- December 09, 2025
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Dangling pointer
Dec 2025: Microsoft Office Remote Code Execution Vulnerability
CVE-2025-62557
8.4 - High
- December 09, 2025
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
Dangling pointer
Dec 2025: Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-62556
7.8 - High
- December 09, 2025
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Untrusted Pointer Dereference
Dec 2025: Microsoft Word Remote Code Execution Vulnerability
CVE-2025-62555
7 - High
- December 09, 2025
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Dangling pointer
Dec 2025: Microsoft Office Remote Code Execution Vulnerability
CVE-2025-62554
8.4 - High
- December 09, 2025
Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.
Object Type Confusion
Dec 2025: Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-62553
7.8 - High
- December 09, 2025
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Dangling pointer
Dec 2025: Microsoft Access Remote Code Execution Vulnerability
CVE-2025-62552
7.8 - High
- December 09, 2025
Relative path traversal in Microsoft Office Access allows an unauthorized attacker to execute code locally.
Relative Path Traversal
Dec 2025: Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-62563
7.8 - High
- December 09, 2025
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Dangling pointer
Dec 2025: Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-62564
7.8 - High
- December 09, 2025
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Out-of-bounds Read
Dec 2025: Microsoft Outlook Remote Code Execution Vulnerability
CVE-2025-62562
7.8 - High
- December 09, 2025
Use after free in Microsoft Office Outlook allows an unauthorized attacker to execute code locally.
Dangling pointer
Dec 2025: Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-62561
7.8 - High
- December 09, 2025
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Untrusted Pointer Dereference
Nov 2025: Microsoft Office Remote Code Execution Vulnerability
CVE-2025-62205
7.8 - High
- November 11, 2025
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Dangling pointer
Nov 2025: Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-62203
7.8 - High
- November 11, 2025
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Dangling pointer
Nov 2025: Microsoft Excel Information Disclosure Vulnerability
CVE-2025-62202
7.1 - High
- November 11, 2025
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Out-of-bounds Read
Nov 2025: Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-62200
7.8 - High
- November 11, 2025
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Untrusted Pointer Dereference
Nov 2025: Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-62201
7.8 - High
- November 11, 2025
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Heap-based Buffer Overflow
Nov 2025: Microsoft Excel Information Disclosure Vulnerability
CVE-2025-59240
5.5 - Medium
- November 11, 2025
Exposure of sensitive information to an unauthorized actor in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Information Disclosure
Nov 2025: Microsoft Office Remote Code Execution Vulnerability
CVE-2025-62216
7.8 - High
- November 11, 2025
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
Dangling pointer
Nov 2025: Microsoft Office Remote Code Execution Vulnerability
CVE-2025-62199
7.8 - High
- November 11, 2025
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
Dangling pointer
Nov 2025: Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-60727
7.8 - High
- November 11, 2025
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Out-of-bounds Read
Nov 2025: Microsoft Excel Information Disclosure Vulnerability
CVE-2025-60728
4.3 - Medium
- November 11, 2025
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Untrusted Pointer Dereference
Nov 2025: Microsoft Excel Information Disclosure Vulnerability
CVE-2025-60726
7.1 - High
- November 11, 2025
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Out-of-bounds Read
Oct 2025: Microsoft PowerPoint Remote Code Execution Vulnerability
CVE-2025-59238
7.8 - High
- October 14, 2025
Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.
Dangling pointer
Oct 2025: Microsoft Excel Information Disclosure Vulnerability
CVE-2025-59232
7.1 - High
- October 14, 2025
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Out-of-bounds Read
Oct 2025: Microsoft Office Denial of Service Vulnerability
CVE-2025-59229
5.5 - Medium
- October 14, 2025
Uncaught exception in Microsoft Office allows an unauthorized attacker to deny service locally.
Uncaught Exception
Oct 2025: Microsoft Office Remote Code Execution Vulnerability
CVE-2025-59227
7.8 - High
- October 14, 2025
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
Dangling pointer
Oct 2025: Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-59225
7.8 - High
- October 14, 2025
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Dangling pointer
Oct 2025: Microsoft Office Visio Remote Code Execution Vulnerability
CVE-2025-59226
7.8 - High
- October 14, 2025
Use after free in Microsoft Office Visio allows an unauthorized attacker to execute code locally.
Dangling pointer
Oct 2025: Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-59224
7.8 - High
- October 14, 2025
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Dangling pointer
Oct 2025: Microsoft Word Remote Code Execution Vulnerability
CVE-2025-59222
7.8 - High
- October 14, 2025
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Dangling pointer
Oct 2025: Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-59223
7.8 - High
- October 14, 2025
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Dangling pointer
Oct 2025: Microsoft Word Remote Code Execution Vulnerability
CVE-2025-59221
7 - High
- October 14, 2025
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Dangling pointer
Oct 2025: Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-59243
7.8 - High
- October 14, 2025
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Dangling pointer
Oct 2025: Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-59236
8.4 - High
- October 14, 2025
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Dangling pointer
Oct 2025: Microsoft Office Remote Code Execution Vulnerability
CVE-2025-59234
7.8 - High
- October 14, 2025
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
Dangling pointer
Oct 2025: Microsoft Excel Information Disclosure Vulnerability
CVE-2025-59235
7.1 - High
- October 14, 2025
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Out-of-bounds Read
Oct 2025: Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-59231
7.8 - High
- October 14, 2025
Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Object Type Confusion
Oct 2025: Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-59233
7.8 - High
- October 14, 2025
Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Object Type Confusion
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