Vendor advisories

Security advisories from the vendors you use.

Search new and updated bulletins from Microsoft, Citrix, Cisco, Palo Alto Networks, Fortinet, Ivanti, Delinea, Ubuntu, and AWS. We keep each vendor's advisory ID, affected products, CVEs, severity, dates, and available fix guidance together.

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9Vendor sources

4,726Advisories collected

2,710Published or updated in 30 days

2,115Marked critical or high

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Connected directly to official vendor sources

The original vendor bulletin remains the authority. SecurityAlert gives you one place to find it and compare the details vendors publish in different formats.

AWS Security Bulletins 111 advisories

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Cisco Security Advisories 34 advisories

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Citrix Security Bulletins 17 advisories

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Delinea Security Advisories 7 advisories

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Fortinet PSIRT Advisories 40 advisories

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Ivanti Security Advisories 5 advisories

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Microsoft Security Response Center 4,344 advisories

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Palo Alto Networks Security Advisories 39 advisories

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Ubuntu Security Notices 129 advisories

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4,726 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.

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Microsoft Security Response CenterCVE-2026-80083

Published Sep 8, 2026

CriticalCVSS 8.8

Windows Hyper-V Remote Code Execution Vulnerability

Untrusted pointer dereference in Windows Hyper-V allows an authorized attacker to execute code locally.

Affected productsWindows Server 2022, Windows Server 2022 (Server Core installation), Windows Server 2025 (Server Core installation), Windows 11 Version 25H2 for ARM64-based Systems

Fixed versions10.0.20348.5622, 10.0.26100.33438, 10.0.26200.9445, 10.0.22631.7582

Vendor guidance

Install KB5122882. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012.

CVE-2026-80083

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-78525

Published Sep 8, 2026

CriticalCVSS 8.8

Microsoft Office Outlook Remote Code Execution Vulnerability

Use after free in Microsoft Office Outlook allows an unauthorized attacker to execute code 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, 16.0.14334.20906, 16.0.17932.20976

Vendor guidance

Release Notes Install KB5002923.

CVE-2026-78525

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-78520

Published Sep 8, 2026

CriticalCVSS 6.5

Microsoft Office Outlook Information Disclosure Vulnerability

Out-of-bounds read in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.

Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906, 16.0.17932.20976

Vendor guidance

Release Notes Install KB5002923.

CVE-2026-78520

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-78519

Published Sep 8, 2026

CriticalCVSS 8.8

Microsoft Office Outlook Remote Code Execution Vulnerability

Use of uninitialized resource in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.

Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906, 16.0.17932.20976

Vendor guidance

Release Notes Install KB5002919.

CVE-2026-78519

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-78510

Published Sep 8, 2026

CriticalCVSS 9.8

Microsoft Word Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906, 16.0.17932.20976

Vendor guidance

Release Notes Install KB5002916.

CVE-2026-78510

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-78509

Published Sep 8, 2026

CriticalCVSS 9.8

Microsoft Office Outlook Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code 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 versions16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906, 16.0.17932.20976

Vendor guidance

Release Notes Install KB5002923.

CVE-2026-78509

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-78505

Published Sep 8, 2026

CriticalCVSS 8.8

Microsoft Office Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code 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 versions16.0.10417.20207, 16.0.20326.20138, 16.112.26083020, 16.0.14334.20906

Vendor guidance

Release Notes Install KB5002916.

CVE-2026-78505

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-78450

Published Sep 8, 2026

CriticalCVSS 8.1

Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution Vulnerability

Use after free in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over a network.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)

Fixed versions10.0.17763.9245, 10.0.20348.5622, 10.0.26100.33438

Vendor guidance

Install KB5122876. Install KB5122882. Install KB5122871.

CVE-2026-78450

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-78449

Published Sep 8, 2026

CriticalCVSS 8.1

Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution Vulnerability

Use after free in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over a network.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)

Fixed versions10.0.17763.9245, 10.0.20348.5622, 10.0.19044.7725, 10.0.19045.7725

Vendor guidance

Install KB5122876. Install KB5122882. Install KB5122878. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012. Install KB5123099. Install KB5123065. Install KB5123066.

CVE-2026-78449

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-78445

Published Sep 8, 2026

CriticalCVSS 9.8

Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability

Use after free in Windows Services for NFS ONCRPC XDR Driver allows an unauthorized attacker to execute code over a network.

Affected productsWindows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022 (Server Core installation)

Fixed versions10.0.17763.9245, 10.0.20348.5622, 10.0.26100.33438, 10.0.14393.9512

Vendor guidance

Install KB5122876. Install KB5122882. Install KB5122871. Install KB5123099. Install KB5123065. Install KB5123066.

CVE-2026-78445

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-78444

Published Sep 8, 2026

CriticalCVSS 8.1

Microsoft Failover Cluster Remote Code Execution Vulnerability

Untrusted pointer dereference in Windows Failover Cluster allows an unauthorized attacker to execute code over a network.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)

Fixed versions10.0.17763.9245, 10.0.20348.5622, 10.0.26100.33438

Vendor guidance

Install KB5122876. Install KB5122882. Install KB5122871.

CVE-2026-78444

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-78439

Published Sep 8, 2026

CriticalCVSS 8.8

Microsoft Office Graphics Component Remote Code Execution Vulnerability

Stack-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code over a network.

Affected productsMicrosoft Office LTSC for Mac 2021, Microsoft Office for Android, Microsoft Office LTSC for Mac 2024, Microsoft Office 365 for Mac

Fixed versions16.0.20430.20000

Vendor guidance

Release Notes

CVE-2026-78439

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-77898

Published Sep 8, 2026

CriticalCVSS 7.5

Microsoft Office Remote Code Execution Vulnerability

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

Affected productsMicrosoft Office LTSC 2024 for 32-bit editions, Microsoft Office LTSC 2021 for 64-bit editions, Microsoft Office LTSC 2021 for 32-bit editions, Microsoft Office 2019 for 64-bit editions

Fixed versions16.0.17932.20976, 16.0.14334.20906, 16.0.10417.20207, 16.0.20326.20138

Vendor guidance

Release Notes

CVE-2026-77898

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-77505

Published Sep 8, 2026

CriticalCVSS 8.1

Windows DNS Server Remote Code Execution Vulnerability

Use after free in DNS Server allows an unauthorized attacker to execute code over a network.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)

Fixed versions10.0.17763.9245, 10.0.20348.5622, 10.0.26100.33438, 10.0.14393.9512

Vendor guidance

Install KB5122876. Install KB5122882. Install KB5122871. Install KB5123099. Install KB5123065. Install KB5123066.

CVE-2026-77505

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-77504

Published Sep 8, 2026

CriticalCVSS 8.8

Microsoft Office Word Remote Code Execution Vulnerability

Double free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)

Fixed versions10.0.17763.9245, 10.0.20348.5622, 10.0.19044.7725, 10.0.19045.7725

Vendor guidance

Install KB5122876. Install KB5122882. Install KB5122878. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012. Install KB5123099. Install KB5123065. Install KB5123066.

CVE-2026-77504

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-77495

Published Sep 8, 2026

CriticalCVSS 8.8

Windows Imaging Component Remote Code Execution Vulnerability

Heap-based buffer overflow in Windows Imaging Component allows an unauthorized attacker to execute code over a network.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)

Fixed versions10.0.17763.9245, 10.0.20348.5622, 10.0.19044.7725, 10.0.19045.7725

Vendor guidance

Install KB5122876. Install KB5122882. Install KB5122878. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012. Install KB5123099. Install KB5123065. Install KB5123066.

CVE-2026-77495

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-77493

Published Sep 8, 2026

CriticalCVSS 9.8

Windows Graphics Component Remote Code Execution Vulnerability

Double free in Microsoft Graphics Component allows an unauthorized attacker to execute code over a network.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)

Fixed versions10.0.17763.9245, 10.0.20348.5622, 10.0.19044.7725, 10.0.19045.7725

Vendor guidance

Install KB5122876. Install KB5122882. Install KB5122878. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012. Install KB5123099. Install KB5123065. Install KB5123066.

CVE-2026-77493

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-73023

Published Sep 8, 2026

CriticalCVSS 8.8

Windows Imaging Component Remote Code Execution Vulnerability

Heap-based buffer overflow in Windows Imaging Component allows an unauthorized attacker to execute code over a network.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)

Fixed versions10.0.17763.9245, 10.0.20348.5622, 10.0.19044.7725, 10.0.19045.7725

Vendor guidance

Install KB5122876. Install KB5122882. Install KB5122878. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012. Install KB5123099. Install KB5123065. Install KB5123066.

CVE-2026-73023

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-73018

Published Sep 8, 2026

CriticalCVSS 8.8

Graphic Fonts Remote Code Execution Vulnerability

Heap-based buffer overflow in Graphic Fonts allows an unauthorized attacker to execute code over a network.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)

Fixed versions10.0.17763.9245, 10.0.20348.5622, 10.0.19044.7725, 10.0.19045.7725

Vendor guidance

Install KB5122876. Install KB5122882. Install KB5122878. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012. Install KB5123099. Install KB5123065. Install KB5123066.

CVE-2026-73018

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-73017

Published Sep 8, 2026

CriticalCVSS 7.5

Graphics Kernel Remote Code Execution Vulnerability

Heap-based buffer overflow in Windows Graphics Kernel allows an authorized attacker to execute code locally.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)

Fixed versions10.0.17763.9245, 10.0.20348.5622, 10.0.19044.7725, 10.0.19045.7725

Vendor guidance

Install KB5122876. Install KB5122882. Install KB5122878. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012.

CVE-2026-73017

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-73013

Published Sep 8, 2026

CriticalCVSS 8.8

Windows Imaging Component Remote Code Execution Vulnerability

Heap-based buffer overflow in Windows Imaging Component allows an unauthorized attacker to execute code over a network.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)

Fixed versions10.0.17763.9245, 10.0.20348.5622, 10.0.19044.7725, 10.0.19045.7725

Vendor guidance

Install KB5122876. Install KB5122882. Install KB5122878. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012. Install KB5123099. Install KB5123065. Install KB5123066.

CVE-2026-73013

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-73010

Published Sep 8, 2026

CriticalCVSS 9.8

Microsoft Failover Cluster Remote Code Execution Vulnerability

Use after free in Windows Failover Cluster allows an unauthorized attacker to execute code over a network.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)

Fixed versions10.0.17763.9245, 10.0.20348.5622, 10.0.26100.33438

Vendor guidance

Install KB5122876. Install KB5122882. Install KB5122871.

CVE-2026-73010

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-73009

Published Sep 8, 2026

CriticalCVSS 9.8

Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability

Use after free in Windows Secure Socket Tunneling Protocol (SSTP) allows an unauthorized attacker to execute code over a network.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)

Fixed versions10.0.17763.9245, 10.0.20348.5622, 10.0.19044.7725, 10.0.19045.7725

Vendor guidance

Install KB5122876. Install KB5122882. Install KB5122878. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012. Install KB5123099. Install KB5123065. Install KB5123066.

CVE-2026-73009

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-73006

Published Sep 8, 2026

CriticalCVSS 8.8

DirectWrite Remote Code Execution Vulnerability

Stack-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code over a network.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)

Fixed versions10.0.17763.9245, 10.0.20348.5622, 10.0.19044.7725, 10.0.19045.7725

Vendor guidance

Install KB5122876. Install KB5122882. Install KB5122878. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012. Install KB5123099.

CVE-2026-73006

Read the vendor advisory Watch this product

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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