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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11Vendor sources

16,850Advisories collected

6,405Published or updated in 30 days

6,992Marked 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 171 advisories

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Apple Security Releases 29 advisories

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Cisco Security Advisories 106 advisories

Check delayedChecked 22 days ago

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Citrix Security Bulletins 24 advisories

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Delinea Security Advisories 14 advisories

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Fortinet PSIRT Advisories 55 advisories

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Ivanti Security Advisories 9 advisories

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Microsoft Security Response Center 15,943 advisories

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Palo Alto Networks Security Advisories 59 advisories

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SonicWall PSIRT Advisories 11 advisories

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Ubuntu Security Notices 429 advisories

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16,850 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-2026-83909

Published Oct 13, 2026

HighCVSS 4.7

Windows Win32 Kernel Subsystem Information Disclosure Vulnerability

Exposure of sensitive system information to an unauthorized control sphere in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.

Affected productsWindows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems, Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems

Fixed versions10.0.26300.9711, 10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807

Vendor guidance

Install KB5127648. Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

CVE-2026-83909

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83908

Published Oct 13, 2026

HighCVSS 7.0

RPC Runtime Elevation of Privilege Vulnerability

Release of invalid pointer or reference in RPC Runtime allows an authorized attacker to elevate privileges 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 versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807

Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

CVE-2026-83908

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83907

Published Oct 13, 2026

HighCVSS 5.5

Windows Hello Information Disclosure Vulnerability

Exposure of sensitive system information to an unauthorized control sphere in Windows Hello allows an authorized attacker to disclose information locally.

Affected productsWindows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 22H2 for x64-based Systems

Fixed versions10.0.19044.7807, 10.0.19045.7807, 10.0.26200.9711, 10.0.22631.7652

Vendor guidance

Install KB5126657. Install KB5127648. Install KB5126653. Install KB5127646.

CVE-2026-83907

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83906

Published Oct 13, 2026

HighCVSS 6.5

Windows Shell Spoofing Vulnerability

Incorrect implementation of authentication algorithm in Windows Shell allows an unauthorized attacker to perform spoofing over a network.

Affected productsWindows Server 2025 (Server Core installation), Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 23H2 for ARM64-based Systems

Fixed versions10.0.26100.33650, 10.0.26200.9711, 10.0.22631.7652, 10.0.26100.9711

Vendor guidance

Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646.

CVE-2026-83906

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83905

Published Oct 13, 2026

HighCVSS 4.7

Windows Shell Information Disclosure Vulnerability

Exposure of sensitive system information to an unauthorized control sphere in Windows Shell allows an authorized attacker to disclose information 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 versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807

Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126836.

CVE-2026-83905

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83904

Published Oct 13, 2026

HighCVSS 5.5

HID Parser Library Information Disclosure Vulnerability

Out-of-bounds read in HID Parser Library allows an authorized attacker to disclose information 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 versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807

Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646.

CVE-2026-83904

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83903

Published Oct 13, 2026

HighCVSS 7.8

Windows Direct Composition Elevation of Privilege Vulnerability

Heap-based buffer overflow in Windows Direct Composition allows an authorized attacker to elevate privileges locally.

Affected productsWindows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems, Windows Server 2025 (Server Core installation), Windows 11 Version 25H2 for ARM64-based Systems

Fixed versions10.0.26300.9711, 10.0.26100.33650, 10.0.26200.9711, 10.0.26100.9711

Vendor guidance

Install KB5127648. Install KB5126646.

CVE-2026-83903

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83902

Published Oct 13, 2026

HighCVSS 7.8

Windows Direct Composition Elevation of Privilege Vulnerability

Heap-based buffer overflow in Windows Direct Composition allows an authorized attacker to elevate privileges locally.

Fixed versions10.0.26300.9711, 10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807

Vendor guidance

Install KB5127648. Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5126653. Install KB5127646.

CVE-2026-83902

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83901

Published Oct 13, 2026

HighCVSS 7.0

Windows Win32 Kernel Subsystem Elevation of Privilege Vulnerability

Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges 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 versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807

Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646.

CVE-2026-83901

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83900

Published Oct 13, 2026

HighCVSS 7.0

Windows Bind Filter Driver Elevation of Privilege Vulnerability

Use after free in Windows Bind Filter Driver allows an authorized attacker to elevate privileges locally.

Fixed versions10.0.26100.33650, 10.0.26200.9711, 10.0.22631.7652, 10.0.26100.9711

Vendor guidance

Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646.

CVE-2026-83900

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83899

Published Oct 13, 2026

HighCVSS 7.0

Windows Installer Elevation of Privilege Vulnerability

Improper privilege management in Windows Installer allows an authorized attacker to elevate privileges 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 versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807

Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

CVE-2026-83899

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83898

Published Oct 13, 2026

HighCVSS 5.5

HID Parser Library Information Disclosure Vulnerability

Out-of-bounds read in HID Parser Library allows an authorized attacker to disclose information 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 versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807

Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646.

CVE-2026-83898

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83897

Published Oct 13, 2026

HighCVSS 4.7

Windows Win32 Kernel Subsystem Information Disclosure Vulnerability

Exposure of sensitive system information to an unauthorized control sphere in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information 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 versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807

Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

CVE-2026-83897

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83896

Published Oct 13, 2026

HighCVSS 7.8

Windows Direct Composition Elevation of Privilege Vulnerability

Heap-based buffer overflow in Windows Direct Composition allows an authorized attacker to elevate privileges locally.

Affected productsWindows 11 Version 26H2 for x64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems

Fixed versions10.0.26300.9711, 10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807

Vendor guidance

Install KB5127648. Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5126653. Install KB5127646. Install KB5126868.

CVE-2026-83896

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83895

Published Oct 13, 2026

HighCVSS 6.8

Windows Win32 Kernel Subsystem Elevation of Privilege Vulnerability

Heap-based buffer overflow in Windows Win32 Kernel Subsystem allows an unauthorized attacker to elevate privileges with a physical attack.

Fixed versions10.0.26300.9711, 10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807

Vendor guidance

Install KB5127648. Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5126653. Install KB5127646.

CVE-2026-83895

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83893

Published Oct 13, 2026

HighCVSS 5.5

Windows Clipboard User Service Information Disclosure Vulnerability

Exposure of sensitive system information to an unauthorized control sphere in Windows Clipboard User Service allows an authorized attacker to disclose information locally.

Fixed versions10.0.26300.9711, 10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807

Vendor guidance

Install KB5127648. Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5126653. Install KB5127646.

CVE-2026-83893

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83892

Published Oct 13, 2026

HighCVSS 5.5

Windows Human Interface Device Information Disclosure Vulnerability

Out-of-bounds read in HID Parser Library allows an authorized attacker to disclose information 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 versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807

Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646.

CVE-2026-83892

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83889

Published Oct 13, 2026

HighCVSS 8.8

Windows DNS Server Remote Code Execution Vulnerability

Release of invalid pointer or reference in DNS Server allows an authorized attacker to execute code over a network.

Fixed versions10.0.26300.9711, 10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807

Vendor guidance

Install KB5127648. Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

CVE-2026-83889

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83888

Published Oct 13, 2026

HighCVSS 6.5

Windows CD-ROM Driver Elevation of Privilege Vulnerability

Buffer over-read in Windows CD-ROM Driver allows an unauthorized attacker to elevate privileges 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 versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807

Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

CVE-2026-83888

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83887

Published Oct 13, 2026

HighCVSS 5.5

HID Parser Library Information Disclosure Vulnerability

Out-of-bounds read in HID Parser Library allows an authorized attacker to disclose information 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 versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807

Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646.

CVE-2026-83887

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83886

Published Oct 13, 2026

HighCVSS 7.0

Windows Update Orchestrator Service Elevation of Privilege Vulnerability

Use after free in Windows Update Orchestrator Service allows an authorized attacker to elevate privileges locally.

Fixed versions10.0.26300.9711, 10.0.26100.33650, 10.0.26200.9711, 10.0.22631.7652

Vendor guidance

Install KB5127648. Install KB5126646. Install KB5126653. Install KB5127646.

CVE-2026-83886

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83885

Published Oct 13, 2026

HighCVSS 5.6

Windows Virtualization-Based Security (VBS) Enclave Spoofing Vulnerability

Inadequate encryption strength in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to perform spoofing 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 versions10.0.20348.5761, 10.0.26100.33650, 10.0.26200.9711, 10.0.26100.9711

Vendor guidance

Install KB5126655. Install KB5126646. Install KB5127648. Install KB5127646.

CVE-2026-83885

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83884

Published Oct 13, 2026

HighCVSS 5.5

Windows Human Interface Device Information Disclosure Vulnerability

Out-of-bounds read in HID Parser Library allows an authorized attacker to disclose information 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 versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807

Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646.

CVE-2026-83884

Read the vendor advisory Watch this product

Microsoft Security Response CenterCVE-2026-83883

Published Oct 13, 2026

HighCVSS 7.8

Windows Win32k Elevation of Privilege Vulnerability

Use after free in Windows Win32K allows an authorized attacker to elevate privileges 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 versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807

Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

CVE-2026-83883

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.

How we check our sources