Description of the security update for Microsoft Exchange Server 2016 CU23: October 14, 2025 (KB5066369)

Description of the security update for Microsoft Exchange Server 2016 CU23: October 14, 2025 KB5066369 Original article content This security update rollup resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see the following Common Vulnerabilities an...

KLA86581 Multiple vulnerabilities in Microsoft Server Software

Multiple vulnerabilities were found in Microsoft Server Software. Malicious users can exploit these vulnerabilities to spoof user interface, obtain sensitive information, execute arbitrary code, gain privileges. Below is a complete list of vulnerabilities: 1. A spoofing vulnerability in Microsoft...

The many lives of BlackCat ransomware

The BlackCat ransomware, also known as ALPHV, is a prevalent threat and a prime example of the growing ransomware-as-a-service RaaS gig economy. It’s noteworthy due to its unconventional programming language Rust, multiple target devices and possible entry points, and affiliation with prolific...

Watch Out! Cryptocurrency Miners Targeting Dockers, AWS and Alibaba Cloud

LemonDuck, a cross-platform cryptocurrency mining botnet, is targeting Docker to mine cryptocurrency on Linux systems as part of an active malware campaign. "It runs an anonymous mining operation by the use of proxy pools, which hide the wallet addresses," CrowdStrike said in a new report. "It...

Vulnerabilities fixed in Microsoft Exchange Server

Microsoft has fixed vulnerabilities in Exchange Server. A malicious party could potentially exploit the vulnerabilities to access gain access to sensitive data, or to execute arbitrary code execute arbitrary code with the application's permissions. Exploitation of both vulnerabilities requires...

URGENT — 4 Actively Exploited 0-Day Flaws Found in Microsoft Exchange

Microsoft has released emergency patches to address four previously undisclosed security flaws in Exchange Server that it says are being actively exploited by a new Chinese state-sponsored threat actor with the goal of perpetrating data theft. Describing the attacks as "limited and targeted,"...

Serious vulnerabilities fixed in Microsoft Exchange Server

Vulnerabilities have been fixed in Microsoft Exchange Server. A combination of several vulnerabilities allow a malicious person remotely able to execute arbitrary code under SYSTEM privileges Microsoft states that the vulnerabilities with attribute CVE-2021-26855, CVE-2021-26857, CVE-2021-26858 a...

Security Update For Exchange Server 2019 CU1 (KB4515832)

The security update addresses 2 vulnerabilities: A denial of service vulnerability exists in Microsoft Exchange Server when the software fails to properly handle objects in memory. A spoofing vulnerability exists in Microsoft Exchange Server when OWA fails to properly handle web requests...

Update Rollup 20 for Exchange Server 2007 Service Pack 3 (KB3151086)

Microsoft is issuing this security update for Oracle binaries to help ensure that all customers using this third-party code in Microsoft Exchange are protected from these vulnerabilities...