Search: “Microsoft Exchange Server”

176 stories

Searchkeyword smart Sortlatest hot importance relevance

DomainAll Cyber AIWindow24h 3d 7d 30d AllIn the wild Important only Show duplicates

CategoryAll Vulnerability 553 Ransomware 411 Malware 252 Exploit / PoC 224 Threat actor 130 Data breach 86 Phishing & fraud 35 Policy & legal 29 Advisory 22 Industry 15 AI tools & infra 6 Tools 5 Research 5 AI safety & security 4

SeverityAll critical 1024 high 534 medium 176 low 32 info 15

Federal agencies have to assess Microsoft Exchange servers by April 5

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

35

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

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

30

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

35

How attackers target and exploit Microsoft Exchange servers

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

35

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

35

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

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

30

Stellar unveils enhanced mailbox database repair software for Microsoft Exchange Server

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

30

Microsoft rolled out emergency fix for Y2k22 bug in Exchange servers

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

30

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

35

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

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

30

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

50

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

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

30

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

30

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

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

30

Microsoft warns of state-sponsored Chinese hackers exploiting multiple zero

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

45

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

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

30

SonicWall confirmed that its products were affected by Y2K22 bug

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

30

ESET fixed two privilege escalation flaws in its products

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

35

Outlook for Web Bans 38 More File Extensions in Email Attachments

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

30

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

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

45

GhostEmperor, new Chinese-speaking threat actor targets Southeast Asia

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

45

Monero Cryptocurrency campaign exploits ProxyLogon flaws

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

45

Chinese National Extradited Over Silk Typhoon Cyber Campaign

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

45

Pwn2Own 2021 Day 1

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

30

Zerodium offers $2 Million for remote iOS jailbreaks, and much more

Security AffairsJan 11, 00:03 UTC · Jan 11, 2019AI safety & security1

30

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

50

Y2k22 bug in Microsoft Exchange causes failure in email delivery

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

30

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

35

Spike in Palo Alto Networks scanner activity suggests imminent cyber threats

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

30

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

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

30

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

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

30

US indicts four members of Chinese hacking group APT40

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

45

Hafnium Tied to Advanced Chinese Surveillance Tools

Infosecurity MagazineJul 30, 16:45 UTC · Jul 30, 2025Vulnerability1

30

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

35

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

35

China

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

30

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

30

Chinese Hackers Infiltrate South American Diplomatic Networks

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

30