Friday , May 9 2025
Exchange server

ShadowServer Foundation
About 20,000 Microsoft Exchange Servers at Risk of Cyberattacks

A lot number of microsoft Exchange email servers in Europe, the United States, and Asia are at risk because they are accessible on the public internet. These servers are using an old and unsupported version of the software, which makes them vulnerable to multiple security issues, including some that are very serious.

The ShadowServer Foundation found 20,000 Microsoft Exchange servers that have reached the end-of-life stage are still accessible online. Most of these servers are in Europe, but there are also many in North America and Asia.

Qilin Ransomware topped April 2025 with 45+ data leak disclosures

The cyber threat landscape is rapidly changing, with a notable increase in ransomware activity in April 2025, driven by the...
Read More
Qilin Ransomware topped April 2025 with 45+ data leak disclosures

SonicWall Patches 3 Flaws in SMA 100 Devices

SonicWall has released patches for three security flaws in SMA 100 Secure Mobile Access appliances that could allow remote code...
Read More
SonicWall Patches 3 Flaws in SMA 100 Devices

Top Ransomware Actively Attacking Financial Sector: 406 Incidents Disclosed

From April 2024 to April 2025, Flashpoint analysts noted that the financial sector was a major target for threat actors,...
Read More
Top Ransomware Actively Attacking Financial Sector: 406 Incidents Disclosed

Critical (CVSS 10) Flaw in Cisco IOS XE WLCs Allows RRA

Cisco has issued a security advisory for a critical vulnerability in its IOS XE Software for Wireless LAN Controllers (WLCs)....
Read More
Critical (CVSS 10) Flaw in Cisco IOS XE WLCs Allows RRA

CVE-2025-29824
Play Ransomware Exploited Windows CVE-2025-29824 as Zero-Day

Attackers linked to the Play ransomware operation deployed a zero-day privilege escalation exploit during an attempted attack against an organization...
Read More
CVE-2025-29824  Play Ransomware Exploited Windows CVE-2025-29824 as Zero-Day

Hacker exploited Samsung MagicINFO 9 Server RCE flaw

Hackers are exploiting an unauthenticated remote code execution vulnerability in the Samsung MagicINFO 9 Server to take control of devices...
Read More
Hacker exploited Samsung MagicINFO 9 Server RCE flaw

CISA adds Langflow flaw to its KEV catalog

CISA added the Langflow vulnerability, CVE-2025-3248 (CVSS score 9.8), to its Known Exploited Vulnerabilities catalog. Langflow is a popular tool...
Read More
CISA adds Langflow flaw to its KEV catalog

Google Fixes Android Flaw (CVE-2025-27363) Exploited by Attackers

Google has released its monthly Android security updates, addressing 46 vulnerabilities, including one that has been actively exploited. CVE-2025-27363 (CVSS...
Read More
Google Fixes Android Flaw (CVE-2025-27363) Exploited by Attackers

UAP hosted “UAP Cyber Siege 2025”, A national level cybersecurity competition

The Cyber Security Club, representing the Department of Computer Science and Engineering at the University of Asia Pacific (UAP), has...
Read More
UAP hosted “UAP Cyber Siege 2025”, A national level cybersecurity competition

xAI Dev Leaks API Key for Private SpaceX, Tesla & Tweeter

A major security issue happened at Elon Musk’s AI company, xAI, when a developer accidentally posted a private API key...
Read More
xAI Dev Leaks API Key for Private SpaceX, Tesla & Tweeter

ShadowServer’s statistics may not show the complete situation. Macnica security researcher Yutaka Sejiyama discovered that there are 30,000 Microsoft Exchange servers that are no longer supported. Sejiyama’s scans on Shodan revealed that these unsupported servers include versions such as Exchange Server 2007, Exchange Server 2010, and most instances of Exchange Server 2013.

Outdated Exchange servers found by ShadowServer and Sejiyama have many vulnerabilities that allow remote code execution. An important security problem is ProxyLogon (CVE-2021-26855) which, when combined with another bug (CVE-2021-27065), allows remote code execution. Sejiyama’s analysis shows that around 1,800 vulnerable Exchange systems are exposed to ProxyLogon, ProxyShell, or ProxyToken vulnerabilities.

Source: ShadowServer Foundation

Organizations have taken steps to deal with these vulnerabilities, but it’s important to know that these measures are not enough. Microsoft advises companies to prioritize updating servers connected to external networks. If servers are no longer supported, upgrading to a version that still receives security updates is the only viable option.

Organizations must act immediately to address the ongoing exploitation of these vulnerabilities and the large number of exposed servers. They should secure their Exchange servers and ensure they are using supported and updated software versions. This will help protect sensitive data and minimize risks.

Check Also

Google

Google Fixes Android Flaw (CVE-2025-27363) Exploited by Attackers

Google has released its monthly Android security updates, addressing 46 vulnerabilities, including one that has …

Leave a Reply

Your email address will not be published. Required fields are marked *