Microsoft has released out-of-band updates to patch three zero-day vulnerabilities, two affecting Exchange Server (remote escalation) and one in the Edge browser’s V8 JavaScript engine (arbitrary code execution). All three are confirmed to be under active exploitation in the wild.
Business Impact
The Exchange Server flaws are the most critical, as they allow attackers to bypass authentication and gain full control over email systems, leading to potential enterprise-wide data theft. The Edge flaw allows web-based attacks to compromise user endpoints.
Why It Happened
Attackers focus heavily on critical enterprise software (Exchange) and widely used components (V8 engine) for maximum impact. The Exchange flaws exploited weaknesses in the proprietary API session handling.
Recommended Executive Action
Direct IT operations to prioritize the Exchange Server patches immediately, treating this as a high-alert situation. Ensure automatic updates are enabled for all corporate endpoints running the Edge browser to mitigate the client-side risk.
Hashtags: #Microsoft #ZeroDay #ExchangeServer #EdgeBrowser #Vulnerability #PatchNow #CyberSecurity #InfoSec