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.
9 results
Oct 20, 2025Microsoft Windows SMB Client Improper Access Control VulnerabilityCVE-2025-33073 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedHigh 8.8
Microsoft Windows SMB Client contains an improper access control vulnerability that could allow for privilege escalation. An attacker could execute a specially crafted malicious script to coerce the victim machine to connect back to the attack system using SMB and authenticate.
- Product
- Windows
- On CISA’s list since
- Oct 20, 2025 (federal fix deadline Nov 10, 2025)
- 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 recordCISA catalogmsrc.microsoft.comvicarius.io
May 24, 2022Microsoft Windows SMBv1 Information Disclosure VulnerabilityCVE-2017-0147 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedRansomwareHigh 7.5
The SMBv1 server in Microsoft Windows allows remote attackers to obtain sensitive information from process memory via a crafted packet.
- Product
- SMBv1 server
- On CISA’s list since
- May 24, 2022 (federal fix deadline Jun 14, 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 recordCISA catalogpacketstormsecurity.compacketstormsecurity.com
May 23, 2022Microsoft Windows SMB Information Disclosure VulnerabilityCVE-2019-0703 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedMedium 6.5
An information disclosure vulnerability exists in the way that the Windows SMB Server handles certain requests, which could lead to information disclosure from the server.
- Product
- Windows
- On CISA’s list since
- May 23, 2022 (federal fix deadline Jun 13, 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 recordCISA catalogportal.msrc.microsoft.comportal.msrc.microsoft.com
Apr 6, 2022Microsoft SMBv1 Server Remote Code Execution VulnerabilityCVE-2017-0148 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedRansomwareHigh 8.1
The SMBv1 server in Microsoft allows remote attackers to execute arbitrary code via crafted packets.
- Product
- SMBv1 server
- On CISA’s list since
- Apr 6, 2022 (federal fix deadline Apr 27, 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 recordCISA catalogpacketstormsecurity.compacketstormsecurity.com
Mar 25, 2022Microsoft Windows SMB Remote Code Execution VulnerabilityCVE-2017-0146 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedRansomwareHigh 8.8
The SMBv1 server in Microsoft Windows allows remote attackers to perform remote code execution.
- Product
- Windows
- On CISA’s list since
- Mar 25, 2022 (federal fix deadline Apr 15, 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 recordCISA catalogpacketstormsecurity.compacketstormsecurity.com
Feb 10, 2022Microsoft SMBv3 Remote Code Execution VulnerabilityCVE-2020-0796 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedRansomwareCritical 10
A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests. An attacker who successfully exploited the vulnerability could gain the ability to execute code on the target server or client.
- Product
- SMBv3
- On CISA’s list since
- Feb 10, 2022 (federal fix deadline Aug 10, 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 recordCISA catalogpacketstormsecurity.compacketstormsecurity.com
Feb 10, 2022Microsoft SMBv1 Remote Code Execution VulnerabilityCVE-2017-0145 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedRansomwareHigh 8.8
The SMBv1 server in multiple Microsoft Windows versions allows remote attackers to execute arbitrary code via crafted packets.
- Product
- SMBv1
- On CISA’s list since
- Feb 10, 2022 (federal fix deadline Aug 10, 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 recordCISA catalogpacketstormsecurity.compacketstormsecurity.com
Feb 10, 2022Microsoft SMBv1 Remote Code Execution VulnerabilityCVE-2017-0144 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedRansomwareHigh 8.8
The SMBv1 server in multiple Microsoft Windows versions allows remote attackers to execute arbitrary code via crafted packets.
- Product
- SMBv1
- On CISA’s list since
- Feb 10, 2022 (federal fix deadline Aug 10, 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 recordCISA catalogpacketstormsecurity.compacketstormsecurity.com
Nov 3, 2021Microsoft Windows Server Message Block (SMBv1) Remote Code Execution VulnerabilityCVE-2017-0143 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedRansomwareHigh 8.8
Microsoft Windows Server Message Block 1.0 (SMBv1) contains an unspecified vulnerability that allows for remote code execution.
- Product
- Windows
- 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 recordCISA catalogpacketstormsecurity.compacketstormsecurity.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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