Microsoft Office 2021
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By the Year
In 2026 there have been 344 vulnerabilities in Microsoft Office 2021 with an average score of 7.3 out of ten. Last year, in 2025 Office 2021 had 141 security vulnerabilities published. That is, 203 more vulnerabilities have already been reported in 2026 as compared to last year. Last year, the average CVE base score was greater by 0.48
| Year | Vulnerabilities | Average Score |
|---|---|---|
| 2026 | 344 | 7.28 |
| 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
Sep 2026: Microsoft Word Remote Code Execution Vulnerability
CVE-2026-62804
7.8 - High
- September 08, 2026
External control of file name or path in Microsoft Office Word allows an unauthorized attacker to execute code locally.
External Control of File Name or Path
Sep 2026: Microsoft Office Excel Information Disclosure Vulnerability
CVE-2026-85875
5.5 - Medium
- September 08, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Out-of-bounds Read
Sep 2026: Microsoft Office Word Information Disclosure Vulnerability
CVE-2026-83951
5.5 - Medium
- September 08, 2026
Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
Buffer Over-read
Sep 2026: Microsoft Office Word Information Disclosure Vulnerability
CVE-2026-83949
5.5 - Medium
- September 08, 2026
Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
Buffer Over-read
Sep 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-81950
7.8 - High
- September 08, 2026
Double free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Double-free
Sep 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-81948
7.8 - High
- September 08, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Heap-based Buffer Overflow
Sep 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-81949
7.8 - High
- September 08, 2026
Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Integer Overflow or Wraparound
Sep 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-81959
7.8 - High
- September 08, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Heap-based Buffer Overflow
Sep 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-81953
7.8 - High
- September 08, 2026
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Stack Overflow
Sep 2026: Microsoft Word Remote Code Execution Vulnerability
CVE-2026-81952
8.8 - High
- September 08, 2026
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Sep 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-81951
7.8 - High
- September 08, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Heap-based Buffer Overflow
Sep 2026: Windows Graphics Component Remote Code Execution Vulnerability
CVE-2026-81955
8.8 - High
- September 08, 2026
Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Sep 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-81388
7.8 - High
- September 08, 2026
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Stack Overflow
Sep 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-81957
7.8 - High
- September 08, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Out-of-bounds Read
Sep 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-81960
7.8 - High
- September 08, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Heap-based Buffer Overflow
Sep 2026: Microsoft Excel Information Disclosure Vulnerability
CVE-2026-81395
5.5 - Medium
- September 08, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Out-of-bounds Read
Sep 2026: Microsoft Excel Information Disclosure Vulnerability
CVE-2026-81394
5.5 - Medium
- September 08, 2026
Exposure of sensitive system information to an unauthorized control sphere in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Exposure of Sensitive System Information to an Unauthorized Control Sphere
Sep 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-81389
7 - High
- September 08, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Heap-based Buffer Overflow
Sep 2026: Microsoft Excel Information Disclosure Vulnerability
CVE-2026-81400
5.5 - Medium
- September 08, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Out-of-bounds Read
Sep 2026: Microsoft Excel Information Disclosure Vulnerability
CVE-2026-81393
5.5 - Medium
- September 08, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Out-of-bounds Read
Sep 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-81956
7.8 - High
- September 08, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Out-of-bounds Read
Sep 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-81397
7.8 - High
- September 08, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Heap-based Buffer Overflow
Sep 2026: Microsoft Excel Information Disclosure Vulnerability
CVE-2026-81392
5.5 - Medium
- September 08, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Out-of-bounds Read
Sep 2026: Microsoft Excel Information Disclosure Vulnerability
CVE-2026-81958
5.5 - Medium
- September 08, 2026
Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Use of Uninitialized Resource
Sep 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-81396
7.8 - High
- September 08, 2026
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Stack Overflow
Sep 2026: Microsoft Excel Information Disclosure Vulnerability
CVE-2026-81401
5.5 - Medium
- September 08, 2026
Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Object Type Confusion
Sep 2026: Microsoft Excel Information Disclosure Vulnerability
CVE-2026-81391
5.5 - Medium
- September 08, 2026
Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Use of Uninitialized Resource
Sep 2026: Microsoft Excel Information Disclosure Vulnerability
CVE-2026-81399
5.5 - Medium
- September 08, 2026
Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Buffer Over-read
Sep 2026: Microsoft Excel Information Disclosure Vulnerability
CVE-2026-81390
5.5 - Medium
- September 08, 2026
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Out-of-bounds Read
Sep 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-81954
7.8 - High
- September 08, 2026
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Dangling pointer
Sep 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-81947
7.8 - High
- September 08, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Heap-based Buffer Overflow
Sep 2026: Microsoft Excel Information Disclosure Vulnerability
CVE-2026-81387
5.5 - Medium
- September 08, 2026
Exposure of sensitive system information to an unauthorized control sphere in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Exposure of Sensitive System Information to an Unauthorized Control Sphere
Sep 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-81398
7.8 - High
- September 08, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Heap-based Buffer Overflow
Sep 2026: Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-81386
7.8 - High
- September 08, 2026
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Heap-based Buffer Overflow
Sep 2026: Microsoft Office Publisher Remote Code Execution Vulnerability
CVE-2026-81385
8.8 - High
- September 08, 2026
Deserialization of untrusted data in Microsoft Office Publisher allows an unauthorized attacker to execute code over a network.
Marshaling, Unmarshaling
Sep 2026: Microsoft Office Information Disclosure Vulnerability
CVE-2026-80082
6.5 - Medium
- September 08, 2026
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
Sep 2026: Microsoft Office Word Information Disclosure Vulnerability
CVE-2026-80090
6.5 - Medium
- September 08, 2026
Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
Sep 2026: Microsoft Office Information Disclosure Vulnerability
CVE-2026-80089
6.5 - Medium
- September 08, 2026
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
Sep 2026: Microsoft Office Information Disclosure Vulnerability
CVE-2026-80091
6.5 - Medium
- September 08, 2026
Use of uninitialized resource in Microsoft Office allows an unauthorized attacker to disclose information over a network.
Use of Uninitialized Resource
Sep 2026: Microsoft Office Word Information Disclosure Vulnerability
CVE-2026-80088
6.5 - Medium
- September 08, 2026
Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
Sep 2026: Microsoft Office Word Remote Code Execution Vulnerability
CVE-2026-80085
8.8 - High
- September 08, 2026
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Sep 2026: Microsoft Office Information Disclosure Vulnerability
CVE-2026-80087
6.5 - Medium
- September 08, 2026
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to disclose information over a network.
Heap-based Buffer Overflow
Sep 2026: Microsoft Office Word Remote Code Execution Vulnerability
CVE-2026-80080
8.8 - High
- September 08, 2026
Double free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Double-free
Sep 2026: Microsoft Office PowerPoint Information Disclosure Vulnerability
CVE-2026-80086
6.5 - Medium
- September 08, 2026
Out-of-bounds read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
Sep 2026: Microsoft Office Outlook Remote Code Execution Vulnerability
CVE-2026-78525
8.8 - High
- September 08, 2026
Use after free in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
Dangling pointer
Sep 2026: Microsoft Office Outlook Information Disclosure Vulnerability
CVE-2026-80084
6.5 - Medium
- September 08, 2026
Out-of-bounds read in Microsoft Office Outlook allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
Sep 2026: Microsoft Office Information Disclosure Vulnerability
CVE-2026-80076
6.5 - Medium
- September 08, 2026
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
Sep 2026: Microsoft Office Word Remote Code Execution Vulnerability
CVE-2026-78526
8.8 - High
- September 08, 2026
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Sep 2026: Microsoft Office Remote Code Execution Vulnerability
CVE-2026-78524
8.8 - High
- September 08, 2026
Out-of-bounds write in Microsoft Office allows an unauthorized attacker to execute code over a network.
Memory Corruption
Sep 2026: Microsoft Office Information Disclosure Vulnerability
CVE-2026-80078
6.5 - Medium
- September 08, 2026
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information over a network.
Out-of-bounds Read
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