The Hacker News·Aug 18, 2025 highHackers Target Over 70 Microsoft Exchange Servers to Steal Credentials via Keyloggers#cve-2014-4078#cve-2020-0796#cve-2021-26855 4 min1
The Hacker News·Mar 7, 2025 criticalChina-Linked Silk Typhoon Expands Cyber Attacks to IT Supply Chains for Initial Access#cve-2025-0282#cve-2024-3400#cve-2023-3519 in the wild 4 min1
Infosecurity Magazine·Sep 24, 2024 critical14 Million Patients Impacted by US Healthcare Data Breaches in 2024#cve-2021-34473#cve-2021-34523#cve-2021-31207 2 min1
Palo Alto Unit 42·Jun 6, 2024 criticalActor Exploits Microsoft Exchange Server Vulnerabilities, Cortex XDR Blocks Harvesting of Credentials#cve-2021-26855#cve-2021-26857#cve-2021-26858 in the wild 13 min
Kaspersky Securelist·Sep 11, 2023 highAnalysis of Cuba ransomware gang activity and tooling#cve-2021-31207#cve-2021-34473#cve-2021-34523 15 min
The Record·Jan 30, 2023 criticalMicrosoft: Chinese APT Targeted Exchange Servers With Four Zero#cve-2021-26855#cve-2021-26857#cve-2021-26858 2 min
The Record·Jan 17, 2023 highGerman government warns of APT27 activity targeting local companies#cve-2021-40539#cve-2021-26855#cve-2021-26857 2 min
The Record·Jan 10, 2023 criticalCISA: Multiple government hacking groups had ‘long#cve-2021-26855#cve-2021-26857#cve-2021-26868 4 min
Security Affairs·Jan 4, 2022 criticalThe worst cyber attacks of 2021#cve-2021-26855#cve-2021-26857#cve-2021-26858 in the wild 4 min1
The Hacker News·Aug 15, 2021 highHackers Actively Searching for Unpatched Microsoft Exchange Servers#cve-2021-26855#cve-2021-27065#cve-2021-34473 in the wild 3 min
The Hacker News·Aug 13, 2021 criticalMicrosoft Issues Security Patches for 89 Flaws — IE 0#cve-2021-26855#cve-2021-26857#cve-2021-26858 in the wild 3 min2
Security Affairs·Jul 28, 2021US, UK, and Australian agencies warn of top routinely exploited issues#cve-2021-26855#cve-2021-26857#cve-2021-26858 2 min1
Kaspersky Securelist·Jun 17, 2021 criticalBlack Kingdom ransomware#cve-2021-27065#cve-2019-11510#cve-2021-26855 11 min
Cisco Talos·Jun 10, 2021 criticalQuarterly Report: Incident Response trends from Spring 2021#cve-2021-26855#cve-2021-26857#cve-2021-26858 8 min
Help Net Security·Jun 8, 2021 criticalMarch 2021 Patch Tuesday forecast: Off to an early start#cve-2021-26855#cve-2021-26857#cve-2021-26858 3 min
Kaspersky Securelist·May 31, 2021 criticalIT threat evolution Q1 2021#cve-2021-26855#cve-2021-26857#cve-2021-26858 in the wild 15 min
Kaspersky Securelist·May 26, 2021 criticalKaspersky Security Bulletin 2020#cve-2020-1380#cve-2020-0986#cve-2021-26855 in the wild 15 min
Cisco Talos·May 7, 2021 criticalLemon Duck spreads its wings: Actors target Microsoft Exchange servers, incorporate new TTPs#cve-2021-26855#cve-2021-26857#cve-2021-26858 15 min1
Security Affairs·Apr 14, 2021 criticalFBI silently removed web shells planted on Microsoft Exchange servers#cve-2021-26855#cve-2021-26857#cve-2021-26858 in the wild 3 min
Security Affairs·Mar 25, 2021 critical62,000 Microsoft Exchange Servers potentially left unpatched#cve-2021-26855#cve-2021-26857#cve-2021-26858 in the wild 3 min
Security Affairs·Mar 24, 2021 critical92% of worldwide Microsoft Exchange IPs are now patched or mitigated#cve-2021-26855#cve-2021-26857#cve-2021-26858 in the wild 2 min
Help Net Security·Mar 19, 2021 highAutomatically mitigate ProxyLogon, detect IoCs associated with SolarWinds attackers' activities#cve-2021-26855#cve-2021-26857#cve-2021-26858 3 min1
Security Affairs·Mar 16, 2021 criticalMicrosoft releases On-premises Mitigation Tool (EOMT) tool to fix ProxyLogon issues#cve-2021-26855#cve-2021-26857#cve-2021-26858 in the wild 4 min