Latest cybersecurity reporting from selected sources.

Zoom warns of a critical Windows flaw, tracked as CVE-2026-53412, that could let attackers take over accounts without authentication. Zoom has fixed a critical Windows vulnerability, tracked as CVE-2026-53412 (CVSS score of 9.8) that could allow unauthenticated attackers to hijack user accounts. The flaw affects older versions of Workplace, the Windows VDI Client, and the […]

CISA confirms BlueHammer (CVE-2026-33825) is now used in ransomware attacks to gain SYSTEM privileges through Microsoft Defender. BlueHammer, tracked as CVE-2026-33825, has moved from proof-of-concept noise to real ransomware attacks in the wild, the US CISA confirms. BlueHammer allows attackers to escalate privileges locally in Microsoft Defender. The vulnerability, along with two other zero-days dubbed […]

Microsoft has disclosed that a privilege escalation and a denial-of-service flaw in Defender has come under active exploitation in the wild

On Thursday, Microsoft shared mitigations for a high-severity Exchange Server vulnerability exploited in attacks that allow threat actors to execute arbitrary code via cross-site scripting (XSS) while targeting Outlook on the web users. [...]

Huntress is warning that threat actors are exploiting three recently disclosed security flaws in Microsoft Defender to gain elevated privileges in compromised systems

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has urged government agencies to apply patches for two security flaws impacting Synacor Zimbra Collaboration Suite (ZCS) and Microsoft Office SharePoint, stating they have been actively exploited in the wild

Trend Micro has patched two critical Apex One vulnerabilities that allow attackers to gain remote code execution (RCE) on vulnerable Windows systems. [...]

QNAP warned customers to patch a critical ASP.NET Core vulnerability that also impacts the company's NetBak PC Agent, a Windows utility for backing& up data to a QNAP network-attached storage (NAS) device. [...]

CISA Issues Emergency Directive Requiring Federal Agencies to Fix FlawA vulnerability in Exchange hybrid deployments could allow attackers to escalate privileges and gain administrative access to cloud-based environments. Microsoft said Tuesday there is no evidence of its exploitation and "strongly" recommended installing hot fix updates made available in April.

Microsoft has warned customers to mitigate a high-severity vulnerability in Exchange Server hybrid deployments that could allow attackers to escalate their privileges in Exchange Online cloud environments without leaving any traces. [...]

Microsoft today released security updates to fix at least 67 vulnerabilities in its Windows operating systems and software. Redmond warns that one of the flaws is already under active attack, and that software blueprints showing how to exploit a pervasive Windows bug patched this month are now public. 

Tech Giant Says Threat Actors Are Exploiting a Flaw in Widely-Targeted Windows ToolRansomware threat actors are exploiting a zero-day vulnerability discovered in a highly targeted Windows logging system tool in a campaign in part targeting U.S. IT and real estate sectors, Microsoft confirmed in a Tuesday blog post urging customers to apply available patches.

A vulnerability in the WinRAR file archiver solution could be exploited to bypass the Mark of the Web (MotW) security warning and execute arbitrary code on a Windows machine. [...]

Mozilla has released Firefox 136.0.4 to patch a critical security vulnerability that can let attackers escape the web browser's sandbox on Windows systems. [...]

Feds Order Agencies to Patch Critical Flaw in Widely Used Local Government SystemHackers are exploiting a critical vulnerability in Trimble's Cityworks platform, an infrastructure management tool used by governments that enables remote code execution on Microsoft IIS web servers. CISA has ordered federal civilian agencies to patch a critical vulnerability by Feb. 28.

Attackers Can Employ a Vulnerable Driver to Target Most Windows and Linux SystemsResearchers are warning Microsoft Windows as well as many Linux distribution users to install updates that revoke permissions for a vulnerable driver that attackers can use to target most systems, allowing them to bypass UEFI Secure Boot and install a bootkit to take full control of a system.

A threat actor known as BrazenBamboo has exploited an unresolved security flaw in Fortinet's FortiClient for Windows to extract VPN credentials as part of a modular framework called DEEPDATA

Microsoft has disclosed a high-severity Exchange Server vulnerability that allows attackers to forge legitimate senders on incoming emails and make malicious messages a lot more effective. [...]

A high-severity flaw impacting Microsoft SharePoint has been added to the Known Exploited Vulnerabilities (KEV) catalog by the U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Tuesday, citing evidence of active exploitation

Microsoft has disclosed an unpatched zero-day in Office that, if successfully exploited, could result in unauthorized disclosure of sensitive information to malicious actors