Microsoft is publishing 137 vulnerabilities on May 2026 Patch Tuesday. Microsoft is not aware of exploitation in the wild or public disclosure for any of these vulnerabilities. So far this month, Microsoft has provided patches to address 133 browser vulnerabilities, which are not included in the Patch Tuesday count above.
Windows Netlogon: critical RCE
Anyone responsible for securing a domain controller should prioritize remediation of CVE-2026-41089, which is a critical stack-based buffer overflow in Windows Netlogon with a CVSS v3 base score of 9.8. Exploitation leads to execution in the context of the Netlogon service, so that’s SYSTEM privileges on the domain controller. For most pentesters, that’s the point at which the customer report more or less writes itself. No privileges or user interaction are required, and attack complexity is low, which suggests that creation of a reliable exploit might not be especially difficult for anyone with knowledge of the specific mechanism.
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:
- Security and Privacy of COVID-19 Contact-Tracing Apps
March 12, 2021
Symantec analyzed the top 25 COVID-19 national contact-tracing apps to see which follow security and privacy best practices. Unfortunately, in this new COVID-19 era it’s not just our computers we have to protect from infection, but also ourselves and our loved ones. Along with social distancing, wearing a mask, and washing our hands, technology is also ...
- Hafnium’s China Chopper: a ‘slick’ and tiny web shell for creating server backdoors
March 11, 2021
Researchers have provided insight into China Chopper, a web shell used by the state-sponsored Hafnium hacking group. Hafnium is a group of cyberattackers originating from China. The collective recently came into the spotlight due to Microsoft linking them to recent attacks exploiting four zero-day vulnerabilities — CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-27065 — in Microsoft Exchange Server. Microsoft ...
- Microsoft Exchange Servers Face APT Attack Tsunami
March 11, 2021
Recently patched Microsoft Exchange vulnerabilities are under fire from at least 10 different advanced persistent threat (APT) groups, all bent on compromising email servers around the world. Overall exploitation activity is snowballing, according to researchers. Microsoft said in early March that it had spotted multiple zero-day exploits in the wild being used to attack on-premises versions ...
- F5 issues BIG-IP patches to tackle unauthenticated remote code execution, critical flaws
March 11, 2021
F5 Networks has pushed out patches to tackle four critical vulnerabilities in BIG-IP, one of which can be exploited for unauthenticated remote code execution (RCE) attacks. The enterprise networking provider’s BIG-IP applications are enterprise-grade, modular software suites designed for data and app delivery, load balancing, traffic management, and other business functions. F5 says that 48 out of ...
- Fake Google reCAPTCHA Phishing Attack Swipes Office 365 Passwords
March 8, 2021
Microsoft users are being targeted with thousands of phishing emails, in an ongoing attack aiming to steal their Office 365 credentials. The attackers add an air of legitimacy to the campaign by leveraging a fake Google reCAPTCHA system and top-level domain landing pages that include the logos of victims’ companies. According to researchers, at least 2,500 ...
- Newest Intel Side-Channel Attack Sniffs Out Sensitive Data
March 8, 2021
Intel processors are vulnerable to a new side-channel attack, which researchers said can allow attackers to steal sensitive information such as encryption keys or passwords. Unlike previous side-channel attacks, this attack does not rely on sharing memory, cache sets and other former tactics. Instead it leverages a component called CPU ring interconnect contention. This component facilitates ...