Microsoft is publishing 167 vulnerabilities on April 2026 Patch Tuesday. Microsoft is aware of exploitation in the wild for one of today’s vulnerabilities, and public disclosure for one other. Microsoft evaluates 19 of the vulnerabilities published today as more likely to see future exploitation.
So far this month, Microsoft has provided patches to address 80 browser vulnerabilities, which are not included in the Patch Tuesday count above. Regular Patch Tuesday watchers will know that these vulnerability totals are significantly higher than usual, especially the browser numbers. Late last week, Microsoft published patches to resolve more than 60 browser vulnerabilities in a single day, which is a new record in that very specific category.
Read more…
Source: Rapid7
Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox
Related:
- ToolShell: a story of five vulnerabilities in Microsoft SharePoint
July 25, 2025
On July 19–20, 2025, various security companies and national CERTs published alerts about active exploitation of on-premise SharePoint servers. According to the reports, observed attacks did not require authentication, allowed attackers to gain full control over the infected servers, and were performed using an exploit chain of two vulnerabilities: CVE-2025-49704 and CVE-2025-49706, publicly named “ToolShell”. Additionally, ...
- Mitel Releases Security Advisories for MiVoice MX-One and MiCollab
July 24, 2025
Mitel has released security advisories to address vulnerabilities in Mitel MiVoice MX-ONE and MiCollab, which are cloud-based platforms that help manage business communications. The critical vulnerability, which has no CVE identifier at the time of publishing this Cyber Alert, affects Mitel MiVoice MX-One and is an authentication bypass vulnerability with a CVSSv3 score of 9.4. Successful ...
- Disrupting active exploitation of on-premises SharePoint vulnerabilities
July 23, 2025
Expanded analysis and threat intelligence from Microsoft continued monitoring of exploitation activity by Storm-2603 leading to the deployment of Warlock ransomware. Based on new information, we have updated the Attribution, Indicators of compromise, extended and clarified Mitigation and protection guidance (including raising Step 6: Restart IIS for emphasis), Detections, and Hunting sections. Read more… Source: Microsoft Sign up for ...
- Hundreds of organizations breached by SharePoint mass-hacks
July 23, 2025
Security researchers say hackers have breached at least 400 organizations by exploiting a zero-day vulnerability in Microsoft SharePoint, signaling a sharp rise in the number of detected compromises since the bug was discovered last week. Eye Security, a Dutch cybersecurity firm that first identified the vulnerability in SharePoint, a popular server software that companies use to ...
- Microsoft releases urgent SharePoint security flaw patches
July 21, 2025
Microsoft has released an urgent patch to fix a zero-day vulnerability affecting on-premises SharePoint servers. The vulnerability is already being exploited in the wild, which is why users are urged to apply the patch immediately and secure their assets. Three Microsoft products were said to be affected: SharePoint Server Subscription Edition, SharePoint Server 2019, and SharePoint ...
- CVE-2025-54309: CrushFTP Zero-Day Exploited in the Wild
July 18, 2025
On Friday, July 18, 2025, managed file transfer vendor CrushFTP released information to a private mailing list on a new critical vulnerability, tracked as CVE-2025-54309, affecting versions below 10.8.5 and 11.3.4_23 across all platforms. According to the public-facing vendor advisory, this vulnerability in the CrushFTP managed file transfer software web interface is being exploited in the ...