Outlook Security
The latest Outlook Security coverage — news, analysis, and updates from the WindowsNews.AI desk.
CVE-2026-45456: Remote Code Execution with CVSS AV:L – Why Microsoft and CVSS Disagree
A newly published vulnerability identifier, CVE-2026-45456, has set off discussion among security professionals because of a seemingly contradictory classification: Microsoft labels it as “Remote...
Microsoft Outlook POP3 SSL/TLS Setting Fails to Encrypt Authentication on Port 110, Report Finds
A June 2 report has drawn attention to a longstanding behavior in Microsoft Outlook that may leave POP3 email accounts vulnerable to credential theft. The issue centers on the SSL/TLS checkbox in...
CVE-2026-21260: Why Partial Patching Leaves Outlook Users Open to Spoofing Attacks
Microsoft's security team published a terse but urgent advisory this week for CVE-2026-21260, an Outlook spoofing vulnerability that could let attackers impersonate trusted senders with alarming...
Microsoft 365 August 2025 Update: Revolutionizing Hybrid Work, Security, and AI Integration
With the August 2025 update, Microsoft 365 propels itself into a new era of collaboration, security, and user empowerment. As both the original sources and lively Windows community discussions...
Authentic Antics: Unveiling Russian State-Sponsored Cyber Attacks Targeting Microsoft Outlook and Microsoft 365
Russian state-sponsored cyber attacks are once again dominating the headlines, driving fresh anxiety across the global IT and security communities. The latest disclosures—centered on a sinister...
Microsoft Outlook's Major Outage: A Deep Dive into Causes, Impact, and User Experiences
A major outage affecting Microsoft Outlook on July 10th, 2025, left millions of users worldwide unable to access their email for over 11 hours. The disruption, impacting Outlook.com, Outlook Mobile,...
Calendar phishing exploits Microsoft 365 invites to bypass spam filters and deploy malware
The growing sophistication of phishing attempts targeting Microsoft 365 and Outlook users highlights a significant challenge for individuals and IT administrators. Even seemingly trustworthy...
Calendar Phishing Alert: How Hackers Exploit Microsoft 365 Invites
Cybercriminals are increasingly exploiting Microsoft 365 calendar invites as a stealthy phishing vector, bypassing traditional email security filters. These attacks leverage the trust users place in...
How to Defend Against Calendar Phishing Scams in Microsoft 365
Microsoft 365 users are facing a sophisticated new threat that bypasses traditional email filters—calendar phishing scams. These attacks exploit the trusted nature of calendar invites, slipping...
KnowBe4 and Microsoft Join Forces to Revolutionize Email Security with AI-Powered Threat Detection
The cybersecurity landscape is evolving rapidly, and email remains one of the most vulnerable attack vectors for organizations worldwide. In a groundbreaking partnership, KnowBe4 and Microsoft have...
Outlook’s new two-click tool lets users verify email encryption without leaving the compose window
Microsoft Outlook has introduced a groundbreaking security feature designed to enhance email privacy: Two-Click Encryption Verification. This update addresses growing concerns about email security in...
Microsoft Outlook to Block .library-ms & .search-ms Files in 2025 Security Update
Microsoft is tightening Outlook's security measures by blocking two potentially dangerous file types—.library-ms and .search-ms—starting July 2025. This move aims to counter sophisticated...