Updated 2 h ago

Vulnerability database

Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.

1,762exploited flaws on CISA’s list

34added in the last 30 days

344new WordPress flaws this week

390,080entries in the database

16 results

Sep 25, 2026Microsoft SharePoint Code Injection VulnerabilityCVE-2026-65660 · Email & office · Microsoft · reported by secure@microsoft.comExploitedHigh 8.8
Microsoft SharePoint contains a code injection vulnerability which could allow an authorized attacker to execute code over a network.
Product
SharePoint
On CISA’s list since
Sep 25, 2026 (federal fix deadline Sep 28, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com blog.previdian.com
Aug 18, 2026Microsoft SharePoint Weak Authentication VulnerabilityCVE-2026-55040 · Email & office · Microsoft · reported by secure@microsoft.comExploitedCritical 9.1
Microsoft SharePoint contains a weak authentication vulnerability which allows an unauthorized attacker to bypass a security feature over a network.
Product
SharePoint
On CISA’s list since
Aug 18, 2026 (federal fix deadline Aug 21, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com github.com
Jul 22, 2026Microsoft SharePoint Deserialization of Untrusted Data Vulnerability CVE-2026-50522 · Email & office · Microsoft · reported by secure@microsoft.comExploitedCritical 9.8
Microsoft SharePoint contains a deserialization of untrusted data vulnerability which could allow an unauthorized attacker to execute code over a network.
Product
SharePoint
On CISA’s list since
Jul 22, 2026 (federal fix deadline Jul 25, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Jul 16, 2026Microsoft SharePoint Deserialization of Untrusted Data VulnerabilityCVE-2026-58644 · Email & office · Microsoft · reported by secure@microsoft.comExploitedCritical 9.8
Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network.
Product
SharePoint
On CISA’s list since
Jul 16, 2026 (federal fix deadline Jul 19, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Jul 14, 2026Microsoft SharePoint Server Missing Authentication for Critical Function VulnerabilityCVE-2026-56164 · Email & office · Microsoft · reported by secure@microsoft.comExploitedMedium 5.3
Microsoft SharePoint contains a missing authentication for critical function vulnerability that allows an unauthorized attacker to elevate privileges over a network.
Product
SharePoint Server
On CISA’s list since
Jul 14, 2026 (federal fix deadline Jul 17, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Jul 1, 2026Microsoft SharePoint Server Deserialization of Untrusted Data VulnerabilityCVE-2026-45659 · Email & office · Microsoft · reported by secure@microsoft.comExploitedRansomwareHigh 8.8
Microsoft SharePoint Server contains a deserialization of untrusted data vulnerability which allows an authorized attacker to execute code over a network.
Product
SharePoint Server
On CISA’s list since
Jul 1, 2026 (federal fix deadline Jul 4, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Apr 14, 2026Microsoft SharePoint Server Improper Input Validation VulnerabilityCVE-2026-32201 · Email & office · Microsoft · reported by secure@microsoft.comExploitedMedium 6.5
Microsoft SharePoint Server contains an improper input validation vulnerability that allows an unauthorized attacker to perform spoofing over a network.
Product
SharePoint Server
On CISA’s list since
Apr 14, 2026 (federal fix deadline Apr 28, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Mar 18, 2026Microsoft SharePoint Deserialization of Untrusted Data VulnerabilityCVE-2026-20963 · Email & office · Microsoft · reported by secure@microsoft.comExploitedCritical 9.8
Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network.
Product
SharePoint
On CISA’s list since
Mar 18, 2026 (federal fix deadline Mar 21, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Jul 22, 2025Microsoft SharePoint Code Injection VulnerabilityCVE-2025-49704 · Email & office · Microsoft · reported by secure@microsoft.comExploitedRansomwareHigh 8.8
Microsoft SharePoint contains a code injection vulnerability that could allow an authorized attacker to execute code over a network. This vulnerability could be chained with CVE-2025-49706. CVE-2025-53770 is a patch bypass for CVE-2025-49704, and the updates for CVE-2025-53770 include more robust protection than those for CVE-2025-49704.
Product
SharePoint
On CISA’s list since
Jul 22, 2025 (federal fix deadline Jul 23, 2025)
What to do
Attackers are using this now. Install Microsoft’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Jul 22, 2025Microsoft SharePoint Improper Authentication VulnerabilityCVE-2025-49706 · Email & office · Microsoft · reported by secure@microsoft.comExploitedRansomwareMedium 6.5
Microsoft SharePoint contains an improper authentication vulnerability that allows an authorized attacker to perform spoofing over a network. Successfully exploitation could allow an attacker to view sensitive information and make some changes to disclosed information. This vulnerability could be chained with CVE-2025-49704. CVE-2025-53771 is a patch bypass for CVE-2025-49706, and the updates for CVE-2025-53771 include more robust protection than those for CVE-2025-49706.
Product
SharePoint
On CISA’s list since
Jul 22, 2025 (federal fix deadline Jul 23, 2025)
What to do
Attackers are using this now. Install Microsoft’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Jul 20, 2025Microsoft SharePoint Deserialization of Untrusted Data VulnerabilityCVE-2025-53770 · Email & office · Microsoft · reported by secure@microsoft.comExploitedRansomwareCritical 9.8
Microsoft SharePoint Server on-premises contains a deserialization of untrusted data vulnerability that could allow an unauthorized attacker to execute code over a network. This vulnerability could be chained with CVE-2025-53771. CVE-2025-53770 is a patch bypass for CVE-2025-49704, and the updates for CVE-2025-53770 include more robust protection than those for CVE-2025-49704.
Product
SharePoint
On CISA’s list since
Jul 20, 2025 (federal fix deadline Jul 21, 2025)
What to do
Attackers are using this now. Install Microsoft’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com arstechnica.com
Oct 22, 2024Microsoft SharePoint Deserialization VulnerabilityCVE-2024-38094 · Email & office · Microsoft · reported by secure@microsoft.comExploitedRansomwareHigh 7.2
Microsoft SharePoint contains a deserialization vulnerability that allows for remote code execution.
Product
SharePoint
On CISA’s list since
Oct 22, 2024 (federal fix deadline Nov 12, 2024)
What to do
Attackers are using this now. Install Microsoft’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com msrc.microsoft.com
Mar 26, 2024Microsoft SharePoint Server Code Injection VulnerabilityCVE-2023-24955 · Email & office · Microsoft · reported by secure@microsoft.comExploitedRansomwareHigh 7.2
Microsoft SharePoint Server contains a code injection vulnerability that allows an authenticated attacker with Site Owner privileges to execute code remotely.
Product
SharePoint Server
On CISA’s list since
Mar 26, 2024 (federal fix deadline Apr 16, 2024)
What to do
Attackers are using this now. Install Microsoft’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com msrc.microsoft.com
Jan 10, 2024Microsoft SharePoint Server Privilege Escalation VulnerabilityCVE-2023-29357 · Email & office · Microsoft · reported by secure@microsoft.comExploitedRansomwareCritical 9.8
Microsoft SharePoint Server contains an unspecified vulnerability that allows an unauthenticated attacker, who has gained access to spoofed JWT authentication tokens, to use them for executing a network attack. This attack bypasses authentication, enabling the attacker to gain administrator privileges.
Product
SharePoint Server
On CISA’s list since
Jan 10, 2024 (federal fix deadline Jan 31, 2024)
What to do
Attackers are using this now. Install Microsoft’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com msrc.microsoft.com
Nov 3, 2021Microsoft SharePoint Remote Code Execution VulnerabilityCVE-2019-0604 · Email & office · Microsoft · reported by secure@microsoft.comExploitedRansomwareCritical 9.8
Microsoft SharePoint fails to check the source markup of an application package. An attacker who successfully exploits the vulnerability could run remote code in the context of the SharePoint application pool and the SharePoint server farm account.
Product
SharePoint
On CISA’s list since
Nov 3, 2021 (federal fix deadline May 3, 2022)
What to do
Attackers are using this now. Install Microsoft’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog securityfocus.com portal.msrc.microsoft.com
Nov 3, 2021Microsoft .NET Framework, SharePoint, and Visual Studio Remote Code Execution VulnerabilityCVE-2020-1147 · Email & office · Microsoft · reported by secure@microsoft.comExploitedHigh 7.8
Microsoft .NET Framework, Microsoft SharePoint, and Visual Studio contain a remote code execution vulnerability when the software fails to check the source markup of XML file input. Successful exploitation allows an attacker to execute code in the context of the process responsible for deserialization of the XML content.
Product
.NET Framework, SharePoint, Visual Studio
On CISA’s list since
Nov 3, 2021 (federal fix deadline May 3, 2022)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog packetstormsecurity.com packetstormsecurity.com

Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.

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Vulnerability database

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