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27 result(s) for "Outlook" — best match first.

What it means for your servers

The security stories that matter, explained by our team — with the concrete steps to take.

Latest headlines from security outlets

Collected every two hours from specialised publications — each link leads to the original article.

The Hacker News
The Hacker News Breaches & leaks

Microsoft 365 Token-Replay Attacks Compromise 97 Accounts at 79 Organizations

Cybersecurity researchers have disclosed a Microsoft 365 campaign that has been observed leveraging an adversary-in-the-middle (AitM) relay to capture sign-in …

Microsoft 365

The Hacker News
The Hacker News Breaches & leaks

ConnectWise Suspends Cloud Backup After Attackers Compromise Microsoft 365 Tenants

ConnectWise on Saturday said it has disabled seven ConnectWise application identities as it continues its investigation into an incident in which unknown threa…

Microsoft 365

BleepingComputer
BleepingComputer Breaches & leaks

Hackers breach Microsoft 365 tenants via ConnectWise supply-chain attack

ConnectWise has shut down customer access to its Cloud Backup service (formerly SkyKick Cloud Backup) after hackers accessed application identities and comprom…

Microsoft 365

The Hacker News
The Hacker News Breaches & leaks

Hackers Use Compromised ConnectWise Credential to Sign In to 173 Microsoft 365 Tenants

Cybersecurity researchers are sounding the alarm related to an active campaign in which unknown threat actors are abusing a compromised Microsoft 365 (M365) cr…

Microsoft 365

The Hacker News
The Hacker News Breaches & leaks

Warlock Exploits SharePoint Flaws to Disable Security Tools and Deploy Ransomware

The suspected China-linked threat actor known as Warlock is still continuing to weaponize Microsoft SharePoint vulnerabilities, likely both old and new, in att…

Microsoft 365

The Hacker News
The Hacker News Breaches & leaks

HollowGraph Malware Hides C2 and Stolen Files in Microsoft 365 Events Dated 2050

A newly discovered espionage implant has been using a hijacked Microsoft 365 calendar as its command channel, planting operator instructions and smuggling out …

Microsoft 365

The Hacker News
The Hacker News Breaches & leaks

CISA Warns of Zimbra, SharePoint Flaw Exploits; Cisco Zero-Day Hit in Ransomware Attacks

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has urged government agencies to apply patches for two security flaws impacting Synacor Zimbra…

Microsoft 365 Cisco

The Hacker News
The Hacker News Breaches & leaks

Storm-2603 Exploits SharePoint Flaws to Deploy Warlock Ransomware on Unpatched Systems

Microsoft has revealed that one of the threat actors behind the active exploitation of SharePoint flaws is deploying Warlock ransomware on targeted systems.The…

Microsoft 365

The Hacker News
The Hacker News Breaches & leaks

Zero-Click AI Vulnerability Exposes Microsoft 365 Copilot Data Without User Interaction

A novel attack technique named EchoLeak has been characterized as a "zero-click" artificial intelligence (AI) vulnerability that allows bad actors to exfiltrat…

Microsoft 365

The Hacker News
The Hacker News Breaches & leaks

Researchers Uncover How Outlook Vulnerability Could Leak Your NTLM Passwords

A now-patched security flaw in Microsoft Outlook could be exploited by threat actors to access NT LAN Manager (NTLM) v2 hashed passwords when opening a special…

Microsoft 365

The Hacker News
The Hacker News Breaches & leaks

Microsoft Warns of Kremlin-Backed APT28 Exploiting Critical Outlook Vulnerability

Microsoft on Monday said it detected Kremlin-backed nation-state activity exploiting a now-patched critical security flaw in its Outlook email service to gain …

Microsoft 365 Exchange

The Hacker News
The Hacker News Breaches & leaks

Outlook Breach: Microsoft Reveals How a Crash Dump Led to a Major Security Breach

Microsoft on Wednesday revealed that a China-based threat actor known asStorm-0558acquired the inactive consumer signing key to forge tokens and access Outlook…

Microsoft 365

The Hacker News
The Hacker News Breaches & leaks

Outlook Hack: Microsoft Reveals How a Crash Dump Led to a Major Security Breach

Microsoft on Wednesday revealed that a China-based threat actor known asStorm-0558acquired the inactive consumer signing key to forge tokens and access Outlook…

Microsoft 365

The Hacker News
The Hacker News Breaches & leaks

Microsoft Warns of Stealthy Outlook Vulnerability Exploited by Russian Hackers

Microsoft on Friday shared guidance to help customers discover indicators of compromise (IoCs) associated with a recently patched Outlook vulnerability.Tracked…

Microsoft 365

The Hacker News
The Hacker News Breaches & leaks

ToddyCat’s New Hacking Tools Steal Outlook Emails and Microsoft 365 Access Tokens

The threat actor known as ToddyCat has been observed adopting new methods to obtain access to corporate email data belonging to target companies, including usi…

Microsoft 365

The Hacker News
The Hacker News Breaches & leaks

Storm-0501 Exploits Entra ID to Exfiltrate and Delete Azure Data in Hybrid Cloud Attacks

The financially motivated threat actor known as Storm-0501 has been observed refining its tactics to conduct data exfiltration and extortion attacks targeting …

Microsoft 365 Azure

LinuxSecurity - Security Articles
LinuxSecurity - Security Articles Breaches & leaks

OpenSSF Outlook Q1 2023: How To Avoid the Next Log4Shell and Other OSS Security Reflections

''Log4j has been around for 20 years; it's become embedded into nearly every meaningful Java application; and the Log4Shell event led to compromises in everyth…

Microsoft 365

The Hacker News
The Hacker News Breaches & leaks

New VOLTA Infostealer Uses Claude, Gemini, and Kimi AI to Rank Victims by Financial Value

Cybersecurity researchers have discovered a new Windows infostealer malware called VOLTA-AUTODOXER (aka VOLTA) that makes use of a large language model (LLM) t…

Windows Microsoft 365 Chrome

BleepingComputer
BleepingComputer Breaches & leaks

The Huntress Tragic Quadrant: Ranking Threats Hitting Businesses Hardest

Attackers are increasingly abusing legitimate IT tools, Microsoft 365 sessions, and everyday workflows to compromise businesses without triggering traditional …

Microsoft 365

The Hacker News
The Hacker News Breaches & leaks

Storm-2603 Deploys DNS-Controlled Backdoor in Warlock and LockBit Ransomware Attacks

The threat actor linked to the exploitation of the recently disclosed security flaws in Microsoft SharePoint Server is using a bespoke command-and-control (C2)…

Microsoft 365

The Hacker News
The Hacker News Breaches & leaks

VEILDrive Attack Exploits Microsoft Services to Evade Detection and Distribute Malware

An ongoing threat campaign dubbed VEILDrive has been observed taking advantage of legitimate services from Microsoft, including Teams, SharePoint, Quick Assist…

Microsoft 365

The Hacker News
The Hacker News Breaches & leaks

New Botnet Malware 'Horabot' Targets Spanish-Speaking Users in Latin America

Spanish-speaking users in Latin America have been at the receiving end of a new botnet malware dubbedHorabotsince at least November 2020."Horabot enables the t…

Microsoft 365 Cisco

The Hacker News
The Hacker News Breaches & leaks

Ransomware Hackers Using New Way to Bypass MS Exchange ProxyNotShell Mitigations

Threat actors affiliated with a ransomware strain known as Play are leveraging a never-before-seen exploit chain that bypasses blocking rules for ProxyNotShell…

Microsoft 365 Exchange

The Hacker News
The Hacker News Breaches & leaks

Hackers Increasingly Using HTML Smuggling in Malware and Phishing Attacks

Threat actors are increasingly banking on the technique ofÂHTML smugglingÂin phishing campaigns as a means to gain initial access and deploy an array of threat…

Microsoft 365