Search: “Microsoft Exchange Server”

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Federal agencies have to assess Microsoft Exchange servers by April 5

Security AffairsApr 2, 10:58 UTC · Apr 2, 2021Vulnerability CVE-2021-26855

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Server-side attacks, C&C in public clouds and other MDR cases we observed

Kaspersky SecurelistNov 2, 08:00 UTC · Nov 2, 2022Vulnerability

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A malware campaign exploits Microsoft Exchange Server flaws

Security AffairsMay 22, 13:21 UTC · May 22, 2024Malware CVE-2021-34473 CVE-2021-34523 CVE-2021-31207

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How attackers target and exploit Microsoft Exchange servers

Help Net SecurityJun 25, 00:00 UTC · Jun 25, 2020Vulnerability CVE-2020-0688

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Crooks compromise Microsoft Exchange servers to hijack internal email chains

Security AffairsNov 21, 11:12 UTC · Nov 21, 2021Vulnerability CVE-2021-26855 CVE-2021-34473 CVE-2021-34523+1 CVEs

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New 'post-exploitation' threat deployed on Microsoft Exchange servers is spotted by researchers

The RecordJan 12, 00:00 UTC · Jan 12, 2023Malware

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Stellar unveils enhanced mailbox database repair software for Microsoft Exchange Server

Help Net SecurityMar 19, 00:00 UTC · Mar 19, 2021Vulnerability

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Microsoft rolled out emergency fix for Y2k22 bug in Exchange servers

Security AffairsJan 3, 07:44 UTC · Jan 3, 2022Vulnerability

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Microsoft urges admins to plug severe Exchange security hole (CVE-2025-53786)

Help Net SecurityAug 11, 09:43 UTC · Aug 11, 2025Vulnerability CVE-2025-53786

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IceID trojan delivered via hijacked email threads, compromised MS Exchange servers

Help Net SecurityMar 29, 00:00 UTC · Mar 29, 2022Malware

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Hackers Exploiting ProxyLogon and ProxyShell Flaws in Spam Campaigns

The Hacker NewsNov 23, 07:33 UTC · Nov 23, 2021Threat actor CVE-2021-26855 CVE-2021-34473 CVE-2021-345231

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Exchange Online will soon start blocking emails from old, vulnerable on-prem servers

Help Net SecurityMar 28, 00:00 UTC · Mar 28, 2023Vulnerability

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Alleged Chinese hacker extradited to US over cyberattacks targeting COVID-19 research

Help Net SecurityApr 28, 00:00 UTC · Apr 28, 2026Data breach

45

TwoFace Webshell: Persistent Access Point for Lateral Movement

Palo Alto Unit 42Nov 1, 10:54 UTC · Nov 1, 2018Malware

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Say “Cheese”: WebMonitor RAT Comes with C2-as-a

Palo Alto Unit 42Nov 1, 11:05 UTC · Nov 1, 2018Malware

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Microsoft warns of state-sponsored Chinese hackers exploiting multiple zero

CyberScoopMar 2, 21:28 UTC · Mar 2, 2021Threat actor

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Exchange 2016, 2019 support ends soon: What IT should do to stay secure

Help Net SecurityMay 30, 00:00 UTC · May 30, 2025Vulnerability

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SonicWall confirmed that its products were affected by Y2K22 bug

Security AffairsJan 8, 13:36 UTC · Jan 8, 2022Malware

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ESET fixed two privilege escalation flaws in its products

Security AffairsSep 23, 17:44 UTC · Sep 23, 2024Vulnerability CVE-2024-7400 CVE-2024-66541

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Outlook for Web Bans 38 More File Extensions in Email Attachments

The Hacker NewsSep 26, 19:21 UTC · Sep 26, 2019Vulnerability

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Microsoft Warns of New Russian State-Sponsored Hacker Group with Destructive Intent

The Hacker NewsJun 15, 00:00 UTC · Jun 15, 2023Threat actor

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GhostEmperor, new Chinese-speaking threat actor targets Southeast Asia

Security AffairsAug 1, 15:50 UTC · Aug 1, 2021Threat actor

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Monero Cryptocurrency campaign exploits ProxyLogon flaws

Security AffairsApr 18, 17:51 UTC · Apr 18, 2021Threat actor

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Chinese National Extradited Over Silk Typhoon Cyber Campaign

Infosecurity MagazineApr 28, 12:30 UTC · Apr 28, 2026Threat actor

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Pwn2Own 2021 Day 1

Security AffairsApr 7, 15:07 UTC · Apr 7, 2021Vulnerability

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FBI, NSA: Russian military cyber-unit behind large-scale brute

The RecordJan 18, 00:00 UTC · Jan 18, 2023Data breach CVE-2020-0688 CVE-2020-17144

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Y2k22 bug in Microsoft Exchange causes failure in email delivery

Security AffairsJan 1, 21:48 UTC · Jan 1, 2022Malware1

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New Samba Bug Allows Remote Attackers to Execute Arbitrary Code as Root

The Hacker NewsFeb 2, 03:56 UTC · Feb 2, 2022Vulnerability CVE-2021-44142 CVE-2021-44141 CVE-2022-0336

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Spike in Palo Alto Networks scanner activity suggests imminent cyber threats

Security AffairsApr 2, 07:29 UTC · Apr 2, 2025Vulnerability

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Dutch intelligence unmasks previously unknown Russian hacking group 'Laundry Bear'

The RecordMay 27, 12:35 UTC · May 27, 2025Malware

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Experts Identify 3 Chinese-Linked Clusters Behind Cyberattacks in Southeast Asia

The Hacker NewsSep 11, 06:03 UTC · Sep 11, 2024Malware

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US indicts four members of Chinese hacking group APT40

The RecordDec 12, 00:00 UTC · Dec 12, 2022Threat actor

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Hafnium Tied to Advanced Chinese Surveillance Tools

Infosecurity MagazineJul 30, 16:45 UTC · Jul 30, 2025Vulnerability2

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Week in review: Keyloggers found on Outlook login pages, police shut down dark web drug market

Help Net SecurityJun 22, 00:00 UTC · Jun 22, 2025Vulnerability CVE-2025-6018 CVE-2025-6019

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Researchers unearth keyloggers on Outlook login pages

Help Net SecurityJun 17, 00:00 UTC · Jun 17, 2025Vulnerability CVE-2021-26855 CVE-2021-34473 CVE-2021-34523+2 CVEs

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China

Infosecurity MagazineMar 23, 17:30 UTC · Mar 23, 2023Malware

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Cryptojacking Group TeamTNT Suspected of Using Decoy Miner to Conceal Data Exfiltration

The Hacker NewsMar 18, 05:01 UTC · Mar 18, 2023Vulnerability

30

New Version of Prometei Botnet Infects Over 10,000 Systems Worldwide

The Hacker NewsMar 11, 06:27 UTC · Mar 11, 2023Malware

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Chinese Hackers Infiltrate South American Diplomatic Networks

Infosecurity MagazineFeb 14, 17:00 UTC · Feb 14, 2023Vulnerability

30

What Talos Incident Response learned from a recent Qakbot attack hijacking old email threads

Cisco TalosJul 27, 12:00 UTC · Jul 27, 2022Vulnerability CVE-2021-26855

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