Microsoft Office 2021
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By the Year
In 2026 there have been 449 vulnerabilities in Microsoft Office 2021 with an average score of 7.5 out of ten. Last year, in 2025 Office 2021 had 141 security vulnerabilities published. That is, 308 more vulnerabilities have already been reported in 2026 as compared to last year. Last year, the average CVE base score was greater by 0.29
| Year | Vulnerabilities | Average Score |
|---|---|---|
| 2026 | 449 | 7.47 |
| 2025 | 141 | 7.76 |
| 2024 | 7 | 7.71 |
| 2023 | 9 | 7.33 |
| 2022 | 0 | 0.00 |
| 2021 | 4 | 7.38 |
| 2020 | 1 | 7.80 |
It may take a day or so for new Office 2021 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 Office 2021 Security Vulnerabilities
Oct 2026: Microsoft Office Excel Information Disclosure Vulnerability
CVE-2026-69922
6.5 - Medium
- October 13, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Microsoft Office Excel Information Disclosure Vulnerability
CVE-2026-97760
6.5 - Medium
- October 13, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97763
8.8 - High
- October 13, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97004
8.8 - High
- October 13, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97775
8.8 - High
- October 13, 2026
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Dangling pointer
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97772
8.8 - High
- October 13, 2026
Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Double-free
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97768
8.8 - High
- October 13, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97746
8.8 - High
- October 13, 2026
Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Integer underflow
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97745
8.8 - High
- October 13, 2026
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Dangling pointer
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97742
8.8 - High
- October 13, 2026
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Stack Overflow
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97756
8.8 - High
- October 13, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97757
8.8 - High
- October 13, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97762
8.8 - High
- October 13, 2026
Out-of-bounds write in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Memory Corruption
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97007
8.8 - High
- October 13, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Oct 2026: Microsoft Office Excel Information Disclosure Vulnerability
CVE-2026-97779
6.5 - Medium
- October 13, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97777
8.8 - High
- October 13, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97773
8.8 - High
- October 13, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97769
8.8 - High
- October 13, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97008
8.8 - High
- October 13, 2026
Buffer underwrite ('buffer underflow') in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
buffer underrun
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97010
8.8 - High
- October 13, 2026
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Dangling pointer
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97011
8.8 - High
- October 13, 2026
Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Use of Uninitialized Resource
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97738
8.8 - High
- October 13, 2026
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Dangling pointer
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97748
8.8 - High
- October 13, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Oct 2026: Microsoft Office PowerPoint Information Disclosure Vulnerability
CVE-2026-88203
6.5 - Medium
- October 13, 2026
Untrusted pointer dereference in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network.
Untrusted Pointer Dereference
Oct 2026: Microsoft Office PowerPoint Remote Code Execution Vulnerability
CVE-2026-88207
7.5 - High
- October 13, 2026
Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Oct 2026: Microsoft Office Excel Information Disclosure Vulnerability
CVE-2026-88195
6.5 - Medium
- October 13, 2026
Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Buffer Over-read
Oct 2026: Microsoft Office Excel Information Disclosure Vulnerability
CVE-2026-88192
6.5 - Medium
- October 13, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Microsoft Office Excel Information Disclosure Vulnerability
CVE-2026-88190
6.5 - Medium
- October 13, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Microsoft Office PowerPoint Remote Code Execution Vulnerability
CVE-2026-88144
8.8 - High
- October 13, 2026
Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a network.
Dangling pointer
Oct 2026: Microsoft Office Click-To-Run Elevation of Privilege Vulnerability
CVE-2026-85340
7.8 - High
- October 13, 2026
Use after free in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.
Dangling pointer
Oct 2026: Microsoft Office Excel Information Disclosure Vulnerability
CVE-2026-88154
6.5 - Medium
- October 13, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Microsoft Office Excel Information Disclosure Vulnerability
CVE-2026-88172
6.5 - Medium
- October 13, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Microsoft Office PowerPoint Information Disclosure Vulnerability
CVE-2026-88183
6.5 - Medium
- October 13, 2026
Out-of-bounds read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Microsoft Office Excel Information Disclosure Vulnerability
CVE-2026-88184
6.5 - Medium
- October 13, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Microsoft Office Word Remote Code Execution Vulnerability
CVE-2026-88185
8.1 - High
- October 13, 2026
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Oct 2026: Microsoft Office Word Remote Code Execution Vulnerability
CVE-2026-88186
8.8 - High
- October 13, 2026
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Oct 2026: Microsoft Office Outlook Information Disclosure Vulnerability
CVE-2026-70281
7.5 - High
- October 13, 2026
Out-of-bounds read in Microsoft Office Outlook allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Microsoft Office Excel Information Disclosure Vulnerability
CVE-2026-70214
5.5 - Medium
- October 13, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Out-of-bounds Read
Oct 2026: Microsoft Office PowerPoint Remote Code Execution Vulnerability
CVE-2026-70215
8.8 - High
- October 13, 2026
Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a network.
Dangling pointer
Oct 2026: Microsoft Office Excel Information Disclosure Vulnerability
CVE-2026-70219
6.5 - Medium
- October 13, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Microsoft Office Outlook Remote Code Execution Vulnerability
CVE-2026-70242
9.8 - Critical
- October 13, 2026
Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-70254
8.8 - High
- October 13, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Out-of-bounds Read
Oct 2026: Microsoft Office Click-To-Run Elevation of Privilege Vulnerability
CVE-2026-88109
7.8 - High
- October 13, 2026
Use after free in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.
Dangling pointer
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-77902
8.8 - High
- October 13, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97780
8.8 - High
- October 13, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97755
8.8 - High
- October 13, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Out-of-bounds Read
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97747
8.8 - High
- October 13, 2026
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Dangling pointer
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97771
8.8 - High
- October 13, 2026
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Dangling pointer
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97767
8.8 - High
- October 13, 2026
Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Double-free
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97770
8.8 - High
- October 13, 2026
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Stack Overflow
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