Microsoft Office 365
Don't miss out!
Thousands of developers use stack.watch to stay informed.Get an email whenever new security vulnerabilities are reported in Microsoft Office 365.
By the Year
In 2026 there have been 356 vulnerabilities in Microsoft Office 365 with an average score of 7.4 out of ten. Office 365 did not have any published security vulnerabilities last year. That is, 356 more vulnerabilities have already been reported in 2026 as compared to last year.
| Year | Vulnerabilities | Average Score |
|---|---|---|
| 2026 | 356 | 7.42 |
| 2025 | 0 | 0.00 |
| 2024 | 0 | 0.00 |
| 2023 | 0 | 0.00 |
| 2022 | 0 | 0.00 |
| 2021 | 0 | 0.00 |
| 2020 | 0 | 0.00 |
| 2019 | 4 | 7.80 |
| 2018 | 1 | 7.80 |
It may take a day or so for new Office 365 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 365 Security Vulnerabilities
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-2026-97741
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-2026-97742
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-2026-97775
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-2026-97745
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-2026-97746
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-2026-97768
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 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-2026-97757
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-2026-97007
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 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 Information Disclosure Vulnerability
CVE-2026-97743
6.5 - Medium
- October 13, 2026
Use after free in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Dangling pointer
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-2026-97762
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 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-2026-97769
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-2026-97777
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-2026-97748
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 Word Security Feature Bypass Vulnerability
CVE-2026-88210
7.8 - High
- October 13, 2026
Reliance on untrusted inputs in a security decision in Microsoft Office Word allows an unauthorized attacker to bypass a security feature locally.
Reliance on Untrusted Inputs in a Security Decision
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 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 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 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 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 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 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 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 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-2026-97778
8.8 - High
- October 13, 2026
Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Integer Overflow or Wraparound
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97765
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-2026-97761
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-2026-97767
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-2026-97780
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-2026-97759
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-2026-97770
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
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97739
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-2026-97771
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-2026-97755
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 Information Disclosure Vulnerability
CVE-2026-97740
6.5 - Medium
- October 13, 2026
Exposure of sensitive system information to an unauthorized control sphere in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Exposure of Sensitive System Information to an Unauthorized Control Sphere
Oct 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-97003
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
Stay on top of Security Vulnerabilities
Want an email whenever new vulnerabilities are published for Microsoft Office 365 or by Microsoft? Click the Watch button to subscribe.
