Monday, June 16, 2025
HomeCyber Security NewsChinese Hackers Were Responsible For The Massive Microsoft Exchange Server Attacks -...

Chinese Hackers Were Responsible For The Massive Microsoft Exchange Server Attacks – NCSC, UK

Published on

SIEM as a Service

Follow Us on Google News

A new research report by the UK, NCSC with Alias, revealed that the Chinese hackers were merely responsible for the massive cyberattack on computer networks around the globe by exploiting Microsoft Exchange Server vulnerabilities.

The chinse-State-sponsored hacking group known as HAFNIUM was reportedly responsible for this massive attack that took place earlier this year.

HAFNIUM is an APT hackers group associated with the Chinese state that is responsible for operating large-scale espionage with the help of sophisticated hacking tools and techniques.

- Advertisement - Google News

The attack caused more than 30,000 companies in the U.S alone, and thousands of organizations were affected worldwide.

Microsoft Exchange Server Vulnerability

During this large scale of ongoing attack, The vulnerabilities have affected the versions 2013, 2016, and 2019, and bugs are being exploited as part of an attack chain.

Microsoft was detailed all the vulnerabilities and CVE in the blog post that was released in March 2021 through which Microsoft alerted its customers to understand these vulnerabilities, and their exploitation patterns, and shared detailed guidance on how the malicious actors are exploiting these vulnerabilities and targeting customers

There are roughly over a quarter of a million servers that are compromised worldwide and enable large-scale espionage, including acquiring personally identifiable information and intellectual property.

According to “NCSC Director of Operations Paul Chichester” The attack on Microsoft Exchange servers is another serious example of a malicious act by Chinese state-backed actors in cyberspace“.

““This kind of behaviour is completely unacceptable, and alongside our partners, we will not hesitate to call it out when we see it.”

The Chinese government was ignored repeated calls to end its reckless campaign and continuously targeting through its state-backed threat actors and won’t respond when it got caught.

“The National Cyber Security Centre (NCSC) issued tailored advice to over 70 affected organizations to enable them successfully to mitigate the effects of the compromise,” NCSC reported.

You can follow us on LinkedinTwitterFacebook for daily Cybersecurity and hacking news updates.

Balaji
Balaji
BALAJI is an Ex-Security Researcher (Threat Research Labs) at Comodo Cybersecurity. Editor-in-Chief & Co-Founder - Cyber Security News & GBHackers On Security.

Latest articles

Kali Linux 2025.2 Released: New Tools, Smartwatch and Car Hacking Added

Kali Linux, the preferred distribution for security professionals, has launched its second major release...

Arsen Launches AI-Powered Vishing Simulation to Help Organizations Combat Voice Phishing at Scale

Arsen, the cybersecurity startup known for defending organizations against social engineering threats, has announced...

NIST Releases New Guide – 19 Strategies for Building Zero Trust Architectures

The National Institute of Standards and Technology (NIST) has released groundbreaking guidance to help...

Spring Framework Flaw Enables Remote File Disclosure via “Content‑Disposition” Header

A medium-severity reflected file download (RFD) vulnerability (CVE-2025-41234) in VMware's Spring Framework has been...

Credential Abuse: 15-Min Attack Simulation

Credential Abuse Unmasked

Credential abuse is #1 attack vector in web and API breaches today (Verizon DBIR 2025). Join our live, 15-min attack simulation with Karthik Krishnamoorthy (CTO - Indusface) and Phani Deepak Akella (VP of Marketing - Indusface) to see hackers move from first probe to full account takeover.

Discussion points


Username & email enumeration – how a stray status-code reveals valid accounts.
Password spraying – low-and-slow guesses that evade basic lockouts.
Credential stuffing – lightning-fast reuse of breach combos at scale.
MFA / session-token bypass – sliding past second factors with stolen cookies.

More like this

Kali Linux 2025.2 Released: New Tools, Smartwatch and Car Hacking Added

Kali Linux, the preferred distribution for security professionals, has launched its second major release...

NIST Releases New Guide – 19 Strategies for Building Zero Trust Architectures

The National Institute of Standards and Technology (NIST) has released groundbreaking guidance to help...

Spring Framework Flaw Enables Remote File Disclosure via “Content‑Disposition” Header

A medium-severity reflected file download (RFD) vulnerability (CVE-2025-41234) in VMware's Spring Framework has been...