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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
18,986Advisories collected
6,810Published or updated in 30 days
8,727Marked critical or high
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The original vendor bulletin remains the authority. SecurityAlert gives you one place to find it and compare the details vendors publish in different formats.

18,986 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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Palo Alto Networks Security AdvisoriesCVE-2026-0300
CriticalCVSS 9.3

CVE-2026-0300: PAN-OS: Unauthenticated user initiated Buffer Overflow Vulnerability in User-ID™ Authentication Portal

A buffer overflow vulnerability in the User-ID™ Authentication Portal (aka Captive Portal) service of Palo Alto Networks PAN-OS software allows an unauthenticated attacker to execute arbitrary code with root privileges on the PA-Series and VM-Series firewalls by sending specia...

Affected productsCloud NGFW, PAN-OS, Prisma Access, PAN-OS 12.1
Fixed versionsCloud NGFW All, PAN-OS 12.1 >= 12.1.4-h5, >= 12.1.7 (ETA: 05/28), PAN-OS 11.2 >= 11.2.4-h17, >= 11.2.7-h13, >= 11.2.10-h6, >= 11.2.12, PAN-OS 11.1 >= 11.1.4-h33, >= 11.1.6-h32, >= 11.1.7-h6, >= 11.1.10-h25, >= 11.1.13-h5, >= 11.1.15
Vendor guidance

VERSION MINOR VERSION SUGGESTED SOLUTION Cloud NGFW No action needed. PAN-OS 12.1 12.1.5 through 12.1.6 Upgrade to 12.1.7 or later. 12.1.2 through 12.1.4-h* Upgrade to 12.1.4-h5 or 12.1.7 or later. PAN-OS 11.2 11.2.11...

CVE-2026-0300
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Microsoft Security Response CenterCVE-2026-33112
HighCVSS 8.8

Microsoft SharePoint Server Remote Code Execution Vulnerability

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Affected productsMicrosoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition
Fixed versions16.0.5552.1002, 16.0.10417.20128, 16.0.19725.20280
Vendor guidance

Install KB5002868. Install KB5002870. Install KB5002863.

CVE-2026-33112
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Fortinet PSIRT AdvisoriesFG-IR-25-545
LowCVSS 1.8

Trusted hosts bypass via SSH

CVSSv3 Score: 1.8 An Improper Privilege Management vulnerability [CWE-269] in FortiOS, FortiProxy and FortiPAM may allow an authenticated administrator to bypass the trusted host policy via crafted CLI command. Revised on 2026-05-27 00:00:00

Affected productsFortiOS, FortiProxy, FortiPAM
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Microsoft Security Response CenterCVE-2026-45659
HighCVSS 8.8

Microsoft SharePoint Remote Code Execution Vulnerability

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Affected productsMicrosoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition
Fixed versions16.0.5552.1002, 16.0.10417.20128, 16.0.19725.20280
Vendor guidance

Install KB5002868. Install KB5002870. Install KB5002863.

CVE-2026-45659
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Microsoft Security Response CenterCVE-2026-45498
LowCVSS 4.0

Microsoft Defender Denial of Service Vulnerability

References Identification Last version of the Microsoft Defender Antimalware Platform affected by this vulnerability 4.18.26030.3011 First version of the Microsoft Defender Antimalware Platform with this vulnerability addressed Version 4.18.26040.7 See Manage Updates Baselines...

Affected productsMicrosoft Defender Antimalware Platform
Fixed versions4.18.26040.7
Vendor guidance

Release Notes

CVE-2026-45498
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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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