CVE-2025-53770

Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network. Microsoft is aware that an exploit for CVE-2025-53770 exists in the wild. Microsoft is preparing and fully testing a comprehensive update to address this vulnerability. In the meantime, please make sure that the mitigation provided in this CVE documentation is in place so that you are protected from exploitation.

Publication date: Sun, 20 Jul 2025 00:00:00 +0000

Cyber News related to CVE-2025-53770

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

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, ...
1 day ago Krebsonsecurity.com CVE-2025-53770

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

Microsoft releases emergency patches for SharePoint RCE flaws exploited in attacks - Microsoft has released emergency SharePoint security updates for two zero-day vulnerabilities tracked as CVE-2025-53770 and CVE-2025-53771 that have compromised services worldwide in "ToolShell" attacks. These flaws were fixed as part of the ...
2 days ago Bleepingcomputer.com CVE-2025-53770

Microsoft Sharepoint ToolShell attacks linked to Chinese hackers - On Monday, after Microsoft released security patches for all impacted SharePoint versions, a CVE-2025-53770 proof-of-concept exploit was also released on GitHub, making it easier for more threat actors and hacking groups to join ongoing attacks. ...
1 day ago Bleepingcomputer.com CVE-2025-53770

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 ...
2 days ago Bleepingcomputer.com CVE-2025-49706

Microsoft Released an Emergency Security Update to Patch a Critical SharePoint 0-Day Vulnerability - Microsoft has issued an urgent security advisory addressing critical zero-day vulnerabilities in on-premises SharePoint Server that attackers are actively exploiting. Microsoft Defender for Endpoint generates specific alerts, including ...
2 days ago Cybersecuritynews.com CVE-2025-53770

Warnings issued as hackers actively exploit critical zero-day in Microsoft SharePoint | The Record from Recorded Future News - Researchers believe the issue is likely to lead to a large number of victims including governments and enterprises, and warn that attackers are compromising cryptographic keys allowing them to maintain access to victims’ systems even after the ...
2 days ago Therecord.media CVE-2025-53770

CVE-2025-53770 - Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network. Microsoft is aware that an exploit for CVE-2025-53770 exists in the wild. Microsoft is preparing and fully ...
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Weekly Cybersecurity Newsletter: Chrome 0-Day, VMware Flaws Patched, Fortiweb Hack, Teams Abuse, and More - Google has issued an emergency security update for its Chrome browser to address a critical zero-day vulnerability, CVE-2025-6558, that is being actively exploited in the wild. The Node.js project released security updates on July 15, 2025, to fix ...
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CISA Warns of Microsoft SharePoint Code Injection and Authentication Vulnerability Exploited in Wild - The vulnerabilities, designated as CVE-2025-49704 and CVE-2025-49706, pose significant risks to organizations running on-premises SharePoint servers and have been added to CISA’s Known Exploited Vulnerabilities (KEV) catalog with an immediate ...
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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, ...
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Chinese Hackers Actively Exploiting SharePoint Servers 0-Day Vulnerability in the Wild - The tech giant’s Security Response Center reported coordinated attacks targeting internet-facing SharePoint installations using newly disclosed vulnerabilities that enable authentication bypass and remote code execution. Microsoft has released ...
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CVE-2025-53770

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