Common Weakness Enumeration
CWE-416
AllowedUse After Free
Abstraction: Variant · Status: Stable
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
3573 vulnerabilities reference this CWE, most recent first.
CVE-2026-97775 (GCVE-0-2026-97775)
Vulnerability from cvelistv5 – Published: 2026-10-13 19:01 – Updated: 2026-10-31 18:12
VLAI
EPSS
VEX
Title
Microsoft Office Excel Remote Code Execution Vulnerability
Summary
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 19:32 UTC
Assigner
microsoft
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.114.26101123
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < 16.0.14334.20974
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < 16.0.17932.21056
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.114.26101123
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.114.26101123
(custom)
|
|
| Microsoft | Office Online Server |
Affected:
16.0.0.0 , < 16.0.10417.20228
(custom)
|
Date Public
2026-10-13 14:00
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CVE-2026-97771 (GCVE-0-2026-97771)
Vulnerability from cvelistv5 – Published: 2026-10-13 19:00 – Updated: 2026-10-31 18:07
VLAI
EPSS
VEX
Title
Microsoft Office Excel Remote Code Execution Vulnerability
Summary
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 19:32 UTC
CWE
- CWE-416 - Use After Free
Assigner
microsoft
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.114.26101123
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < 16.0.14334.20974
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < 16.0.17932.21056
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.114.26101123
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.114.26101123
(custom)
|
|
| Microsoft | Office Online Server |
Affected:
16.0.0.0 , < 16.0.10417.20228
(custom)
|
Date Public
2026-10-13 14:00
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CVE-2026-97759 (GCVE-0-2026-97759)
Vulnerability from cvelistv5 – Published: 2026-10-13 19:00 – Updated: 2026-10-31 18:07
VLAI
EPSS
VEX
Title
Microsoft Office Excel Remote Code Execution Vulnerability
Summary
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 19:33 UTC
CWE
- CWE-416 - Use After Free
Assigner
microsoft
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.114.26101123
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < 16.0.17932.21056
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.114.26101123
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.114.26101123
(custom)
|
Date Public
2026-10-13 14:00
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CVE-2026-97752 (GCVE-0-2026-97752)
Vulnerability from cvelistv5 – Published: 2026-10-13 19:00 – Updated: 2026-10-31 18:07
VLAI
EPSS
VEX
Title
Microsoft Office Excel Remote Code Execution Vulnerability
Summary
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 19:34 UTC
CWE
- CWE-416 - Use After Free
Assigner
microsoft
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.114.26101123
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < 16.0.14334.20974
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < 16.0.17932.21056
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.114.26101123
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.114.26101123
(custom)
|
|
| Microsoft | Office Online Server |
Affected:
16.0.0.0 , < 16.0.10417.20228
(custom)
|
Date Public
2026-10-13 14:00
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CVE-2026-97747 (GCVE-0-2026-97747)
Vulnerability from cvelistv5 – Published: 2026-10-13 19:00 – Updated: 2026-10-31 18:07
VLAI
EPSS
VEX
Title
Microsoft Office Excel Remote Code Execution Vulnerability
Summary
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 19:35 UTC
CWE
- CWE-416 - Use After Free
Assigner
microsoft
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.114.26101123
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < 16.0.14334.20974
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < 16.0.17932.21056
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.114.26101123
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.114.26101123
(custom)
|
|
| Microsoft | Office Online Server |
Affected:
16.0.0.0 , < 16.0.10417.20228
(custom)
|
Date Public
2026-10-13 14:00
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CVE-2026-97745 (GCVE-0-2026-97745)
Vulnerability from cvelistv5 – Published: 2026-10-13 19:01 – Updated: 2026-10-31 18:12
VLAI
EPSS
VEX
Title
Microsoft Office Excel Remote Code Execution Vulnerability
Summary
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 19:35 UTC
CWE
- CWE-416 - Use After Free
Assigner
microsoft
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.114.26101123
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < 16.0.14334.20974
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < 16.0.17932.21056
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.114.26101123
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.114.26101123
(custom)
|
Date Public
2026-10-13 14:00
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CVE-2026-97743 (GCVE-0-2026-97743)
Vulnerability from cvelistv5 – Published: 2026-10-13 19:01 – Updated: 2026-10-31 18:11
VLAI
EPSS
VEX
Title
Microsoft Office Excel Information Disclosure Vulnerability
Summary
Use after free in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 19:35 UTC
CWE
- CWE-416 - Use After Free
Assigner
microsoft
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.114.26101123
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.114.26101123
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.114.26101123
(custom)
|
Date Public
2026-10-13 14:00
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CVE-2026-97738 (GCVE-0-2026-97738)
Vulnerability from cvelistv5 – Published: 2026-10-13 19:01 – Updated: 2026-10-31 18:11
VLAI
EPSS
VEX
Title
Microsoft Office Excel Remote Code Execution Vulnerability
Summary
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 19:35 UTC
CWE
- CWE-416 - Use After Free
Assigner
microsoft
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.114.26101123
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < 16.0.14334.20974
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < 16.0.17932.21056
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.114.26101123
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.114.26101123
(custom)
|
|
| Microsoft | Office Online Server |
Affected:
16.0.0.0 , < 16.0.10417.20228
(custom)
|
Date Public
2026-10-13 14:00
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CVE-2026-97222 (GCVE-0-2026-97222)
Vulnerability from cvelistv5 – Published: 2026-09-25 13:51 – Updated: 2026-09-25 16:14
VLAI
EPSS
VEX
Title
Gnumeric: gnumeric: heap use-after-free when opening a malformed workbook
Summary
A heap use-after-free flaw was found in Gnumeric. When a user opens a crafted Gnumeric workbook containing a malformed SheetObjectComponent element, the XML parser can dereference a freed sheet-object component, causing Gnumeric to crash.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 16:14 UTC
CWE
- CWE-416 - Use After Free
Assigner
fedora
CNA
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-97222 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2541397 | issue-trackingx_refsource_REDHAT |
| https://gitlab.gnome.org/GNOME/gnumeric/-/issues/897 |
Impacted products
Date Public
2026-09-20 18:49
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CVE-2026-97206 (GCVE-0-2026-97206)
Vulnerability from cvelistv5 – Published: 2026-10-21 08:57 – Updated: 2026-10-29 19:08
VLAI
EPSS
VEX
Title
DNS-over-QUIC (DoQ) path-migration can lead to use-after-free on multi-threaded deployments.
Summary
NLnet Labs Unbound, 1.22.0 up to and including version 1.26.1, contains a DNS-over-QUIC (DoQ) lifetime bug reachable by a remote DoQ client under multi-threaded operation. A client-triggered QUIC path migration can enter stream/connection cleanup while a mesh reply still retains a pointer to the DoQ stream. Cleanup frees the DoQ stream and when the pending mesh reply later completes it dereferences a stale pointer leading to a crash.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-29 19:08 UTC
CWE
- CWE-416 - Use After Free
Assigner
NLnet Labs
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://www.nlnetlabs.nl/downloads/unbound/CVE-20… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| NLnet Labs | Unbound |
Affected:
1.22.0 , < 1.26.2
(semver)
|
Date Public
2026-10-21 00:00
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Mitigation
Architecture and Design
Strategy: Language Selection
Choose a language that provides automatic memory management.
Mitigation
Implementation
Strategy: Attack Surface Reduction
When freeing pointers, be sure to set them to NULL once they are freed. However, the utilization of multiple or complex data structures may lower the usefulness of this strategy.
No CAPEC attack patterns related to this CWE.