Vulnerabilities by vendor · updated on every deploy

Microsoft vulnerabilities: exploited CVEs and our analysis

Microsoft has 390 vulnerabilities in CISA's Known Exploited Vulnerabilities catalog, 43 of them added in the last 12 months and 117 known to be used in ransomware campaigns. Below: the 10 analyses Zero Hunt Research published on Microsoft products, then the catalog entries newest first with the federal due date.

CISA catalog version 2026.10.21, released 2026-10-21 14:04 UTC.

390

CVEs in CISA KEV

43

Added in the last 12 months

117

Known ransomware use

10

Zero Hunt analyses

Products with the most KEV entries: Windows (173) · Internet Explorer (36) · Office (29) · Win32k (25) · Exchange Server (17) · SharePoint (10)

Our analysis of Microsoft vulnerabilities

Latest 40 of 390 KEV entries

AddedCVEProduct and vulnerabilityFederal due dateFlagsOur analysis
2026-10-13CVE-2026-96951

Windows

Microsoft Windows Shell contains a command injection vulnerability that allows an unauthorized attacker to bypass a security feature over a network.

2026-10-16
Forensic triage
Read →
2026-09-25CVE-2026-65660

SharePoint

Microsoft SharePoint contains a code injection vulnerability which could allow an authorized attacker to execute code over a network.

2026-09-28
Forensic triage
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2026-09-08CVE-2026-85880

Windows

Microsoft Windows Advanced Local Procedure Call contains a heap-based buffer overflow vulnerability that allows an attacker to elevate privileges locally.

2026-09-22
Read →
2026-09-08CVE-2026-81963

Windows

Microsoft Windows Update Stack contains a link following vulnerability that allows a local attacker to escalate privileges locally up to SYSTEM.

2026-09-22
Read →
2026-08-26CVE-2019-1068

SQL Server

Microsoft SQL Server contains a remote code execution vulnerability that could allow an attacker to execute code in the context of the SQL Server Database Engine service account.

2026-08-29
Forensic triage
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2026-08-18CVE-2026-55040

SharePoint

Microsoft SharePoint contains a weak authentication vulnerability which allows an unauthorized attacker to bypass a security feature over a network.

2026-08-21
Forensic triage
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2026-08-18CVE-2026-33824

Internet Key Exchange (IKE) Service Extensions

Microsoft Internet Key Exchange (IKE) Service Extensions contains a double free vulnerability that could enable remote code execution.

2026-08-21
Read →
2026-08-11CVE-2026-68820

Windows Ancillary Function Driver for WinSock

Microsoft Windows Ancillary Function Driver for WinSock contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally.

2026-08-25
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2026-07-22CVE-2026-50522

SharePoint

Microsoft SharePoint contains a deserialization of untrusted data vulnerability which could allow an unauthorized attacker to execute code over a network.

2026-07-25
Forensic triage
Read →
2026-07-16CVE-2026-58644

SharePoint

Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network.

2026-07-19
Forensic triage
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2026-07-14CVE-2026-56164

SharePoint Server

Microsoft SharePoint contains a missing authentication for critical function vulnerability that allows an unauthorized attacker to elevate privileges over a network.

2026-07-17
Forensic triage
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2026-07-14CVE-2026-56155

Active Directory Federation Services

Microsoft Active Directory Federation Services contains an insufficient granularity of access control vulnerability that allows an authorized attacker to elevate privileges locally.

2026-07-28
Read →
2026-07-01CVE-2026-45659

SharePoint Server

Microsoft SharePoint Server contains a deserialization of untrusted data vulnerability which allows an authorized attacker to execute code over a network.

2026-07-04
RansomwareForensic triage
Read →
2026-05-20CVE-2026-45498

Defender

Microsoft Defender contains an unspecified vulnerability that allows for denial of service.

2026-06-03
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2026-05-20CVE-2026-41091

Defender

Microsoft Defender contains a link following vulnerability that allows an authorized attacker to elevate privileges locally.

2026-06-03
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2026-05-20CVE-2010-0806

Internet Explorer

Microsoft Internet Explorer contains an use-after-free vulnerability that could allow remote attackers to execute arbitrary code via vectors involving access to an invalid pointer after the deletion of an object. The…

2026-06-03
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2026-05-20CVE-2010-0249

Internet Explorer

Microsoft Internet Explorer contains an use-after-free vulnerability that could allow remote attackers to execute arbitrary code by accessing a pointer associated with a deleted object. The impacted product could be e…

2026-06-03
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2026-05-20CVE-2009-1537

DirectX

Microsoft DirectX contains a NULL byte overwrite vulnerability in the QuickTime Movie Parser Filter in quartz.dll in DirectShow which could allow remote attackers to execute arbitrary code via a crafted QuickTime medi…

2026-06-03
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2026-05-20CVE-2008-4250

Windows

Microsoft Windows contains a buffer overflow vulnerability in the Windows Server Service that allows remote attackers to execute arbitrary code via a crafted RPC request that triggers an overflow during path canonical…

2026-06-03
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2026-05-15CVE-2026-42897

Microsoft

Microsoft Exchange Server contains a cross-site scripting vulnerability during web page generation in Outlook Web Access and when certain interaction conditions are met, arbitrary JavaScript can be executed in the bro…

2026-05-29
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2026-04-28CVE-2026-32202

Windows

Microsoft Windows Shell contains a protection mechanism failure vulnerability that allows an unauthorized attacker to perform spoofing over a network.

2026-05-12
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2026-04-22CVE-2026-33825

Defender

Microsoft Defender contains an insufficient granularity of access control vulnerability that could allow an authorized attacker to escalate privileges locally.

2026-05-06
Ransomware
—
2026-04-14CVE-2026-32201

SharePoint Server

Microsoft SharePoint Server contains an improper input validation vulnerability that allows an unauthorized attacker to perform spoofing over a network.

2026-04-28
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2026-04-14CVE-2009-0238

Office

Microsoft Office Excel contains a remote code execution vulnerability that could allow an attacker to take complete control of an affected system if a user opens a specially crafted Excel file that includes a malforme…

2026-04-28
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2026-04-13CVE-2025-60710

Windows

Microsoft Windows contains a link following vulnerability that allows for privilege escalation

2026-04-27
Ransomware
—
2026-04-13CVE-2023-36424

Windows

Microsoft Windows Common Log File System Driver contains an out-of-bounds read vulnerability that could allow a threat actor for privileges escalation

2026-04-27
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2026-04-13CVE-2023-21529

Exchange Server

Microsoft Exchange Server contains a deserialization of untrusted data that allows an authenticated attacker to achieve remote code execution.

2026-04-27
Ransomware
—
2026-04-13CVE-2012-1854

Visual Basic for Applications (VBA)

Microsoft Visual Basic for Applications (VBA) contains an insecure library loading vulnerability that could allow for remote code execution.

2026-04-27
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2026-03-18CVE-2026-20963

SharePoint

Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network.

2026-03-21
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2026-02-17CVE-2008-0015

Windows

Microsoft Windows Video ActiveX Control contains a remote code execution vulnerability. An attacker could exploit the vulnerability by constructing a specially crafted Web page. When a user views the Web page, the vul…

2026-03-10
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2026-02-12CVE-2024-43468

Configuration Manager

Microsoft Configuration Manager contains an SQL injection vulnerability. An unauthenticated attacker could exploit this vulnerability by sending specially crafted requests to the target environment which are processed…

2026-03-05
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2026-02-10CVE-2026-21533

Windows

Microsoft Windows Remote Desktop Services contains an improper privilege management vulnerability that could allow an authorized attacker to elevate privileges locally.

2026-03-03
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2026-02-10CVE-2026-21525

Windows

Microsoft Windows Remote Access Connection Manager contains a NULL pointer dereference that could allow an unauthorized attacker to deny service locally.

2026-03-03
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2026-02-10CVE-2026-21519

Windows

Microsoft Desktop Windows Manager contains a type confusion vulnerability that could allow an authorized attacker to elevate privileges locally.

2026-03-03
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2026-02-10CVE-2026-21514

Office

Microsoft Office Word contains a reliance on untrusted inputs in a security decision vulnerability that could allow an authorized attacker to elevate privileges locally.

2026-03-03
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2026-02-10CVE-2026-21513

Windows

Microsoft MSHTML Framework contains a protection mechanism failure vulnerability that could allow an unauthorized attacker to bypass a security feature over a network.

2026-03-03
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2026-02-10CVE-2026-21510

Windows

Microsoft Windows Shell contains a protection mechanism failure vulnerability that could allow an unauthorized attacker to bypass a security feature over a network.

2026-03-03
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2026-01-26CVE-2026-21509

Office

Microsoft Office contains a security feature bypass vulnerability in which reliance on untrusted inputs in a security decision in Microsoft Office could allow an unauthorized attacker to bypass a security feature loca…

2026-02-16
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2026-01-13CVE-2026-20805

Windows

Microsoft Windows Desktop Windows Manager contains an information disclosure vulnerability that allows an authorized attacker to disclose information locally.

2026-02-03
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2026-01-07CVE-2009-0556

Office

Microsoft Office PowerPoint contains a code injection vulnerability that allows remote attackers to execute arbitrary code via a PowerPoint file with an OutlineTextRefAtom containing an invalid index value that trigge…

2026-01-28
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Source: CISA Known Exploited Vulnerabilities catalog (public data). Descriptions are CISA's, shortened. Always check the vendor advisory before acting. cisa.gov

Before you patch: three checks

  1. 01Match the exact version and configuration you run against the vendor advisory. Owning the product is not the same as being exposed.
  2. 02Check reachability: an exploited flaw on an interface reachable from the internet, or from a compromised workstation, moves to the front of the queue.
  3. 03Where CISA flags forensic triage, hunt for compromise as well as patch: a fix does not remove an attacker who got in before it.

Questions

How many Microsoft vulnerabilities are in the CISA KEV catalog?

390 in catalog version 2026.10.21, the first added on 2021-11-03 and the most recent on 2026-10-13. 43 were added in the last 12 months.

Which Microsoft products have the most exploited vulnerabilities?

By KEV entries: Windows (173), Internet Explorer (36), Office (29), Win32k (25), Exchange Server (17), SharePoint (10).

Are Microsoft vulnerabilities used in ransomware attacks?

CISA marks 117 of the 390 Microsoft entries as known to be used in ransomware campaigns. The table flags them.

Is the next Microsoft CVE exploitable on your network?

A KEV entry says a vulnerability is exploited somewhere. Zero Hunt answers whether it is exploitable in your environment: an autonomous AI red team on an on-premise appliance, running on private AI, black-box or gray-box, with a human approving every step that matters.

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