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:
- Rapid7 Observed Exploitation of Atlassian Confluence CVE-2023-22518
November 6, 2023
As of November 5, 2023, Rapid7 Managed Detection and Response (MDR) is observing exploitation of Atlassian Confluence in multiple customer environments, including for ransomware deployment. We have confirmed that at least some of the exploits are targeting CVE-2023-22518, an improper authorization vulnerability affecting Confluence Data Center and Confluence Server. Atlassian published an advisory for the vulnerability ...
- New Report On Suffolk County Cyber Attack Raises Questions
November 6, 2023
The former IT commissioner for the Suffolk County Clerk’s department did not alert county officials that the computer network in the clerk’s office was responding to a “radical malware attack” until eight hours after he was alerted, the Press has learned. The Center for Internet Security (CIS) sent an email at 3 a.m. on Sept. 8, ...
- Atlassian update: “Take immediate action” to patch your Confluence Data Center and Server instances
November 2, 2023
Atlassian has released an advisory about a critical severity authentication vulnerability in the Confluence Server and Data Center. All versions of Confluence Data Center and Server are affected by this unexploited vulnerability. Atlassian Cloud sites are not impacted by this vulnerability, so if your Confluence site is accessed via an atlassian.net domain, it is not ...
- SolarWinds and its CISO accused of misleading investors before major cyberattack
November 1, 2023
The Securities and Exchange Commission (SEC) has announced charges against software company SolarWinds Corporation and its chief information security officer (CISO), Timothy G. Brown, for “fraud and internal control failures relating to allegedly known cybersecurity risks and vulnerabilities.” In 2020, SolarWinds announced it had been hacked and that its compromised software channel was used to push ...
- Ransomware gang HelloKitty exploits critical Apache ActiveMQ bug CVE-2023-46604
November 1, 2023
Beginning Friday, October 27, Rapid7 Managed Detection and Response (MDR) identified suspected exploitation of Apache ActiveMQ CVE-2023-46604 in two different customer environments. In both instances, the adversary attempted to deploy ransomware binaries on target systems in an effort to ransom the victim organizations. Based on the ransom note and available evidence, we attribute the activity to ...
- Investigation of Session Hijacking via Citrix NetScaler ADC and Gateway Vulnerability (CVE-2023-4966)
October 31, 2023
On Oct. 10, 2023, Citrix released a security bulletin for a sensitive information disclosure vulnerability (CVE-2023-4966) impacting NetScaler ADC and NetScaler Gateway appliances. Mandiant has identified zero-day exploitation of this vulnerability in the wild beginning in late August 2023 as well as n-day exploitation after Citrix’s publication. Mandiant is investigating multiple instances of successful exploitation of ...

