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
2026-10-13
Windows Shell CVE-2026-96951: an exploited Mark-of-the-Web bypass, patch nowCVE-2026-96951 is an actively exploited Windows Shell bug that bypasses Mark of the Web via command injection. CISA set a 3-day patch deadline — who's exposed and how to fix it.
2026-09-11
Windows Zero-Days CVE-2026-85880 & CVE-2026-81963: Two SYSTEM Escalations Rated 'Important'Microsoft's two actively exploited September 2026 zero-days, CVE-2026-85880 and CVE-2026-81963, are both local privilege escalations to SYSTEM — and both scored only 7.8.
2026-08-25
Windows IKE CVE-2026-33824: The AI Ran Recon, a Human Pulled the TriggerCVE-2026-33824 is a wormable pre-auth RCE in the Windows IKE service, now on CISA KEV. It surfaced inside a DeepSeek-driven autonomous attack campaign. Here is the fix runbook and what the AI tempo really changed.
2026-08-16
Windows DNS Server CVE-2026-62878: a Wormable Pre-Auth RCE on Every Domain ControllerCVE-2026-62878 is a wormable, unauthenticated RCE in Windows DNS Server — CVSS 9.8, on every domain controller. A public DoS PoC exists, RCE not yet — why 'exploitation less likely' is the window.
2026-07-23
SharePoint CVE-2026-50522: the machine keys outlive the patchCVE-2026-50522 is the fourth SharePoint flaw added to CISA KEV in 22 days. Attackers pull the ASP.NET machine keys in one request — and keep code execution after you patch.
2026-07-17
CVE-2026-56155 AD FS Zero-Day: From Local Privilege to Golden SAMLCVE-2026-56155 is rated 7.8, but on an AD FS server it exposes the token-signing key: Golden SAML. Why the patch does not take it back, and what to rotate.
2026-07-14
RoguePlanet: The Microsoft Defender Zero-Day That Hands Attackers SYSTEMRoguePlanet (CVE-2026-50656) is a Microsoft Defender race condition that spawns a SYSTEM shell on fully patched Windows. Why the detector becoming the attack surface breaks host-based defense.
2026-07-03
SharePoint CVE-2026-45659: Patched in May, Exploited in JulyCVE-2026-45659 is an authenticated RCE in on-prem SharePoint — silently fixed in May 2026, left off the bulletin, and now actively exploited and on the CISA KEV list.
2026-06-23
SearchLeak: the one-click Copilot prompt injection that exfiltrates your mailboxVaronis' SearchLeak (CVE-2026-42824) turned Microsoft 365 Copilot into a one-click data-theft tool. A year after EchoLeak, the same prompt-injection exfiltration pattern is back — here's why it keeps working.
2026-06-18
DragonForce's Backdoor.Turn: Ransomware C2 That Rides Microsoft Teams RelaysDragonForce's Backdoor.Turn tunnels ransomware C2 through legitimate Microsoft Teams TURN relays over QUIC, invisible to signature NDR. Why behavioral traffic ML is the only witness.
Latest 40 of 390 KEV entries
| Added | CVE | Product and vulnerability | Federal due date | Flags | Our analysis |
|---|---|---|---|---|---|
| 2026-10-13 | CVE-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 → |
| 2026-09-25 | CVE-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 | — |
| 2026-09-08 | CVE-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 → | |
| 2026-09-08 | CVE-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 → | |
| 2026-08-26 | CVE-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 | — |
| 2026-08-18 | CVE-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 | — |
| 2026-08-18 | CVE-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 → | |
| 2026-08-11 | CVE-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 | — | |
| 2026-07-22 | CVE-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 → |
| 2026-07-16 | CVE-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 | — |
| 2026-07-14 | CVE-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 | — |
| 2026-07-14 | CVE-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 → | |
| 2026-07-01 | CVE-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 → |
| 2026-05-20 | CVE-2026-45498 | Defender Microsoft Defender contains an unspecified vulnerability that allows for denial of service. | 2026-06-03 | — | |
| 2026-05-20 | CVE-2026-41091 | Defender Microsoft Defender contains a link following vulnerability that allows an authorized attacker to elevate privileges locally. | 2026-06-03 | — | |
| 2026-05-20 | CVE-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 | — | |
| 2026-05-20 | CVE-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 | — | |
| 2026-05-20 | CVE-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 | — | |
| 2026-05-20 | CVE-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 | — | |
| 2026-05-15 | CVE-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 | — | |
| 2026-04-28 | CVE-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 | — | |
| 2026-04-22 | CVE-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 | — |
| 2026-04-14 | CVE-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 | — | |
| 2026-04-14 | CVE-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 | — | |
| 2026-04-13 | CVE-2025-60710 | Windows Microsoft Windows contains a link following vulnerability that allows for privilege escalation | 2026-04-27 | Ransomware | — |
| 2026-04-13 | CVE-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 | — | |
| 2026-04-13 | CVE-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 | — |
| 2026-04-13 | CVE-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 | — | |
| 2026-03-18 | CVE-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 | — | |
| 2026-02-17 | CVE-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 | — | |
| 2026-02-12 | CVE-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 | — | |
| 2026-02-10 | CVE-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 | — | |
| 2026-02-10 | CVE-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 | — | |
| 2026-02-10 | CVE-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 | — | |
| 2026-02-10 | CVE-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 | — | |
| 2026-02-10 | CVE-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 | — | |
| 2026-02-10 | CVE-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 | — | |
| 2026-01-26 | CVE-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 | — | |
| 2026-01-13 | CVE-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 | — | |
| 2026-01-07 | CVE-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 | — |
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
- 01Match the exact version and configuration you run against the vendor advisory. Owning the product is not the same as being exposed.
- 02Check reachability: an exploited flaw on an interface reachable from the internet, or from a compromised workstation, moves to the front of the queue.
- 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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