CyberSecurityBoard
Sponsor Register Login

CISA Warns of Chinese Hackers Exploiting SharePoint 0-Day Flaws in Active Exploitation

The attack campaign, dubbed “ToolShell,” leverages a vulnerability chain involving CVE-2025-49706 (network spoofing) and CVE-2025-49704 (remote code execution) to gain unauthorized access to on-premises SharePoint servers. Additionally, organizations must scan for connections from three specific IP addresses: 107.191.58[.]76, 104.238.159[.]149, and 96.9.125[.]147, particularly focusing on activity between July 18-19, 2025. Organizations operating end-of-life SharePoint versions, such as SharePoint Server 2013, should immediately disconnect these systems from internet-facing networks. Security researchers from Eye Security and Palo Alto Networks Unit42 have provided detailed analysis of the exploitation methods being employed. Apply patches immediately, configure AMSI, and disconnect end-of-life SharePoint systems. The company has also identified two additional patch bypass vulnerabilities: CVE-2025-53771 and CVE-2025-53770, which could potentially circumvent the initial fixes for the primary vulnerabilities. Critical mitigation steps include rotating ASP.NET machine keys both before and after applying patches, then restarting IIS web servers to ensure complete protection.

This Cyber News was published on cybersecuritynews.com. Publication date: Wed, 23 Jul 2025 10:45:06 +0000


Cyber News related to CISA Warns of Chinese Hackers Exploiting SharePoint 0-Day Flaws in Active Exploitation

Microsoft Fix Targets Attacks on SharePoint Zero-Day – Krebs on Security - In an advisory about the SharePoint security hole, a.k.a. CVE-2025-53770, Microsoft said it is aware of active attacks targeting on-premises SharePoint Server customers and exploiting vulnerabilities that were only partially addressed by the July 8, ...
2 days ago Krebsonsecurity.com CVE-2025-53770
CISA adds Check Point Quantum Security Gateways and Linux Kernel flaws to its Known Exploited Vulnerabilities catalog - CISA adds Apache Flink flaw to its Known Exploited Vulnerabilities catalog. CISA adds D-Link DIR router flaws to its Known Exploited Vulnerabilities catalog. CISA adds Google Chrome zero-days to its Known Exploited Vulnerabilities catalog. CISA adds ...
1 year ago Securityaffairs.com
Chinese hacking documents offer glimpse into state surveillance - Chinese police are investigating an unauthorized and highly unusual online dump of documents from a private security contractor linked to the nation's top policing agency and other parts of its government - a trove that catalogs apparent hacking ...
1 year ago Apnews.com
Cybersecurity Crisis Looms: FBI Chief Unveils Chinese Hackers' Plan to Target US Infrastructure - As the head of the FBI pointed out Wednesday, Beijing was positioning itself to disrupt the daily lives of Americans if there was ever a war between the United States and China if it were to plant malware to damage civilian infrastructure. U.S. ...
1 year ago Cysecurity.news Volt Typhoon
Microsoft SharePoint zero-day exploited in RCE attacks, no patch available - The Microsoft SharePoint zero-day attacks were first identified by Dutch cybersecurity firm Eye Security, which told BleepingComputer that over 75 companies have already been compromised by the attacks. In May, Viettel Cyber Security researchers ...
3 days ago Bleepingcomputer.com CVE-2025-49706
Russia's Midnight Blizzard stole email of more Microsoft customers - Microsoft Patch Tuesday security updates for May 2024 fixes 2 actively exploited zero-days. Microsoft fixed two zero-day bugs exploited in malware attacks. CISA adds Microsoft SharePoint bug disclosed at Pwn2Own to its Known Exploited Vulnerabilities ...
1 year ago Securityaffairs.com CVE-2020-3259 CVE-2023-22515 Akira
Microsoft Releases Mitigations and Threat Hunting Queries for SharePoint Zero-Day - Thousands of organizations worldwide face active cyberattacks targeting Microsoft SharePoint servers through two critical vulnerabilities, prompting urgent government warnings and emergency patches. Microsoft released emergency security updates on ...
1 day ago Cybersecuritynews.com CVE-2025-53770
New MOVEit Transfer critical bug is actively exploited - MUST READ. New MOVEit Transfer critical bug is actively exploited. CISA adds Microsoft SharePoint bug disclosed at Pwn2Own to its Known Exploited Vulnerabilities catalog. Critical Fortinet's FortiClient EMS flaw actively exploited in the wild. PoC ...
1 year ago Securityaffairs.com CVE-2020-3259 CVE-2023-22515 CVE-2023-40044 CVE-2023-20109 Rocke
CISA Warns of Microsoft SharePoint server 0-Day RCE Vulnerability Exploited in Wild - CISA has issued an urgent warning about a critical zero-day remote code execution vulnerability affecting Microsoft SharePoint Server on-premises installations that threat actors are actively exploiting in the wild. The vulnerability, tracked as ...
2 days ago Cybersecuritynews.com CVE-2025-53770
10 of the biggest zero-day attacks of 2023 - Here are 10 of the biggest zero-day attacks of 2023 in chronological order. Zero-day attacks started strong in 2023 with CVE-2023-0669, a pre-authentication command injection vulnerability in Fortra's GoAnywhere managed file transfer product. ...
1 year ago Techtarget.com CVE-2023-0669 CVE-2023-34362 CVE-2023-36884 CVE-2023-4863 CVE-2023-41992 CVE-2023-41991 CVE-2023-41993 CVE-2023-22515
New ATM Malware family emerged in the threat landscape - Threat actors may have exploited a zero-day in older iPhones, Apple warns. Microsoft fixed two zero-day bugs exploited in malware attacks. Threat actors actively exploit JetBrains TeamCity flaws to deliver malware. Raspberry Robin spotted using two ...
1 year ago Securityaffairs.com CVE-2023-49103 CVE-2023-46747 CVE-2023-46748 CVE-2023-4966
Check Point released hotfix for actively exploited VPN zero-day - MUST READ. Check Point released hotfix for actively exploited VPN zero-day. Microsoft Patch Tuesday security updates for May 2024 fixes 2 actively exploited zero-days. Critical Fortinet's FortiClient EMS flaw actively exploited in the wild. Apple ...
1 year ago Securityaffairs.com CVE-2024-23222 CVE-2023-22515 CVE-2023-40044 CVE-2023-20109
CERT-UA warns of malware campaign conducted by threat actor UAC-0006 - Threat actors may have exploited a zero-day in older iPhones, Apple warns. Microsoft fixed two zero-day bugs exploited in malware attacks. Threat actors actively exploit JetBrains TeamCity flaws to deliver malware. Recent DarkGate campaign exploited ...
1 year ago Securityaffairs.com CVE-2023-49103 CVE-2023-46747 CVE-2023-46748 CVE-2023-4966 CVE-2023-3519
Belgium probes if Chinese hackers breached its intelligence service - According to The Brussels Times, the hacked server also routed internal HR exchanges among Belgian intelligence personnel, raising concerns about the potential exposure of sensitive personal data including identity documents and CVs belonging to ...
4 months ago Bleepingcomputer.com APT3 APT30 GALLIUM
Uncovering Chinas Surveillance of the United States Spies Hackers and Informants - Last week, a Chinese surveillance balloon in the United States caused a diplomatic uproar and raised concerns about how Beijing collects intelligence on its biggest rival. FBI Director Christopher Wray said in 2020 that Chinese spying is the most ...
2 years ago Securityweek.com Silence
CISA pledges to resolve issues with threat sharing system after watchdog report - On Friday, the Department of Homeland Security’s Office of the Inspector General published a report on Automated Indicator Sharing (AIS) — which was used to spread cyber threat intelligence and was mandated as part of a 2015 law. The nation’s ...
9 months ago Therecord.media
Google links WinRAR exploitation to Russian, Chinese state hackers - Google says that several state-backed hacking groups have joined ongoing attacks exploiting a high-severity vulnerability in WinRAR, a compression software used by over 500 million users, aiming to gain arbitrary code execution on targets' systems. ...
1 year ago Bleepingcomputer.com CVE-2023-38831 CVE-2023-40477 APT28
Top 10 Best Active Directory Management Tools in 2025 - SolarWinds Access Rights Manager (ARM) is a robust Active Directory management tool designed to enhance security and simplify user permissions management. Dameware Remote Everywhere (DRE) is a powerful Active Directory management tool that provides ...
3 months ago Cybersecuritynews.com
Sav-Rx data breach impacted over 2.8 million individuals - Microsoft Patch Tuesday security updates for May 2024 fixes 2 actively exploited zero-days. Nation-state actors exploited two zero-days in ASA and FTD firewalls to breach government networks. Microsoft fixed two zero-day bugs exploited in malware ...
1 year ago Securityaffairs.com CVE-2020-3259 CVE-2023-22515 APT29 BianLian
CISA confirms compromise of its Ivanti systems - CISA confirmed two of its internal systems were breached by a threat actor that exploited flaws in Ivanti products used by the U.S. cybersecurity agency. Ivanti on Jan. 10 disclosed two zero-day vulnerabilities that were under exploitation by a ...
1 year ago Techtarget.com CVE-2023-46805 CVE-2024-21887
newsletter Round 473 by Pierluigi Paganini - Microsoft Patch Tuesday security updates for May 2024 fixes 2 actively exploited zero-days. Microsoft fixed two zero-day bugs exploited in malware attacks. HTTP/2 CONTINUATION Flood technique can be exploited in DoS attacks. BianLian group exploits ...
1 year ago Securityaffairs.com CVE-2020-3259 CVE-2023-46747 CVE-2023-46748 CVE-2023-22515 APT29 Rocke BianLian
Hackers breach US govt agencies using Adobe ColdFusion exploit - The U.S. Cybersecurity and Infrastructure Security Agency is warning about hackers actively exploiting a critical vulnerability in Adobe ColdFusion identified as CVE-2023-26360 to gain initial access to government servers. The security issue allows ...
1 year ago Bleepingcomputer.com CVE-2023-26360
Opening Statement by CISA Director Jen Easterly - Chairman Gallagher, Ranking Member Krishnamoorthi, Members of the Committee, thank you for the opportunity to testify on CISA's efforts to protect the Nation from the preeminent cyber threat posed by the People's Republic of China. As America's ...
1 year ago Cisa.gov
Hackers exploit VMware ESXi, Microsoft SharePoint zero-days at Pwn2Own - During the second day of Pwn2Own Berlin 2025, competitors earned $435,000 after exploiting zero-day bugs in multiple products, including Microsoft SharePoint, VMware ESXi, Oracle VirtualBox, Red Hat Enterprise Linux, and Mozilla Firefox. Palo Alto ...
2 months ago Bleepingcomputer.com

Latest Cyber News


Cyber Trends (last 7 days)


Trending Cyber News (last 7 days)