Vendor advisories

Microsoft Security Response Center

Browse 15,972 advisories from this official source. Search by product, CVE, severity, or advisory ID.

Current Checked 3 hours ago Checked every 6 hours

15,972 advisories

Each date says whether the vendor published or updated the bulletin. A vendor bulletin describes products that may be affected. It does not prove that the vulnerable product or version is installed in your environment.

RSS for these results
Microsoft Security Response CenterCVE-2026-81956
HighCVSS 7.8

Microsoft Excel Remote Code Execution Vulnerability

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Affected productsMicrosoft Office 365 for Mac, Office Online Server, Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions
Fixed versions16.113.26091433, 16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002910. Install KB5002914. Install KB5002904.

Microsoft Security Response CenterCVE-2026-81954
HighCVSS 7.8

Microsoft Excel Remote Code Execution Vulnerability

Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Affected productsMicrosoft Office 365 for Mac, Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems
Fixed versions16.113.26091433, 16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002914. Install KB5002904.

Microsoft Security Response CenterCVE-2026-81947
HighCVSS 7.8

Microsoft Excel Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Affected productsOffice Online Server, Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002910. Install KB5002914. Install KB5002904.

Microsoft Security Response CenterCVE-2026-81401
HighCVSS 5.5

Microsoft Excel Information Disclosure Vulnerability

Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

Affected productsOffice Online Server, Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002910. Install KB5002914. Install KB5002904.

Microsoft Security Response CenterCVE-2026-81400
HighCVSS 5.5

Microsoft Excel Information Disclosure Vulnerability

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002914. Install KB5002904.

Microsoft Security Response CenterCVE-2026-81399
HighCVSS 5.5

Microsoft Excel Information Disclosure Vulnerability

Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002914. Install KB5002904.

Microsoft Security Response CenterCVE-2026-81398
HighCVSS 7.8

Microsoft Excel Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002914. Install KB5002904.

Microsoft Security Response CenterCVE-2026-81397
HighCVSS 7.8

Microsoft Excel Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002914. Install KB5002904.

Microsoft Security Response CenterCVE-2026-81395
HighCVSS 5.5

Microsoft Excel Information Disclosure Vulnerability

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002914. Install KB5002904.

Microsoft Security Response CenterCVE-2026-81394
HighCVSS 5.5

Microsoft Excel Information Disclosure Vulnerability

Exposure of sensitive system information to an unauthorized control sphere in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002914. Install KB5002904.

Microsoft Security Response CenterCVE-2026-81393
HighCVSS 5.5

Microsoft Excel Information Disclosure Vulnerability

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002914. Install KB5002904.

Microsoft Security Response CenterCVE-2026-81392
HighCVSS 5.5

Microsoft Excel Information Disclosure Vulnerability

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002914. Install KB5002904.

Microsoft Security Response CenterCVE-2026-81391
HighCVSS 5.5

Microsoft Excel Information Disclosure Vulnerability

Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002914. Install KB5002904.

Microsoft Security Response CenterCVE-2026-81390
HighCVSS 5.5

Microsoft Excel Information Disclosure Vulnerability

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

Affected productsOffice Online Server, Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002910. Install KB5002914. Install KB5002904.

Microsoft Security Response CenterCVE-2026-81389
HighCVSS 7.0

Microsoft Excel Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Affected productsMicrosoft Office 365 for Mac, Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems
Fixed versions16.113.26091433, 16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002914. Install KB5002904.

Microsoft Security Response CenterCVE-2026-81388
HighCVSS 7.8

Microsoft Excel Remote Code Execution Vulnerability

Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Affected productsMicrosoft Office 365 for Mac, Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems
Fixed versions16.113.26091433, 16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002914. Install KB5002904.

Microsoft Security Response CenterCVE-2026-81387
HighCVSS 5.5

Microsoft Excel Information Disclosure Vulnerability

Exposure of sensitive system information to an unauthorized control sphere in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002914. Install KB5002904.

Microsoft Security Response CenterCVE-2026-81386
HighCVSS 7.8

Microsoft Excel Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002914. Install KB5002904.

Microsoft Security Response CenterCVE-2026-80091
HighCVSS 6.5

Microsoft Office Information Disclosure Vulnerability

Use of uninitialized resource in Microsoft Office allows an unauthorized attacker to disclose information over a network.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002916.

Microsoft Security Response CenterCVE-2026-80090
HighCVSS 6.5

Microsoft Office Word Information Disclosure Vulnerability

Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002923.

Microsoft Security Response CenterCVE-2026-80089
HighCVSS 6.5

Microsoft Office Information Disclosure Vulnerability

Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information over a network.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002916.

Microsoft Security Response CenterCVE-2026-80088
HighCVSS 6.5

Microsoft Office Word Information Disclosure Vulnerability

Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002916.

Microsoft Security Response CenterCVE-2026-80087
HighCVSS 6.5

Microsoft Office Information Disclosure Vulnerability

Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to disclose information over a network.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002916.

Microsoft Security Response CenterCVE-2026-80086
HighCVSS 6.5

Microsoft Office PowerPoint Information Disclosure Vulnerability

Out-of-bounds read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network.

Affected productsMicrosoft Office 365 for Mac, Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems
Fixed versions16.113.26091433, 16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906
Vendor guidance

Release Notes

Before you act

Start with the vendor's bulletin.

We normalize the fields that vendors publish so you can search and compare advisories in one place. We do not replace the original bulletin or turn a product-name match into proof that a system is vulnerable.

Confirm the installed product and version, read the linked vendor guidance, and test the recommended update or mitigation through your normal change process.

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