SharePoint

Another SharePoint RCE exploited: Patch, then rotate your machine keys (CVE-2026-50522)

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Another SharePoint RCE exploited: Patch, then rotate your machine keys (CVE-2026-50522) 2026-07-22 at 14:47 By Zeljka Zorz Attackers are exploiting a critical SharePoint remote code execution (RCE) vulnerability (CVE-2026-50522) to extract the servers’ IIS machine keys. “WatchTowr is observing active exploitation of CVE-2026-50522 against on-premise Microsoft SharePoint deployments following the release of public exploit code, […]

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Fourth SharePoint Vulnerability Exploited in Past Month’s Wave of Attacks

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Fourth SharePoint Vulnerability Exploited in Past Month’s Wave of Attacks 2026-07-22 at 14:29 By Eduard Kovacs CVE-2026-50522 is being exploited by threat actors to steal machine keys and retain long-term access. The post Fourth SharePoint Vulnerability Exploited in Past Month’s Wave of Attacks appeared first on SecurityWeek. This article is an excerpt from SecurityWeek View

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Fresh SharePoint Vulnerability Exploited Soon After Disclosure

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Fresh SharePoint Vulnerability Exploited Soon After Disclosure 2026-07-17 at 10:15 By Ionut Arghire The critical-severity security defect allows remote, authenticated attackers to execute arbitrary code on the server. The post Fresh SharePoint Vulnerability Exploited Soon After Disclosure appeared first on SecurityWeek. This article is an excerpt from SecurityWeek View Original Source

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CISA Urges Immediate Patching of Exploited SharePoint Vulnerabilities

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CISA Urges Immediate Patching of Exploited SharePoint Vulnerabilities 2026-07-15 at 17:07 By Ionut Arghire Three vulnerabilities are actively exploited in attacks, including two that have been targeted as zero-days. The post CISA Urges Immediate Patching of Exploited SharePoint Vulnerabilities appeared first on SecurityWeek. This article is an excerpt from SecurityWeek View Original Source

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High-severity SharePoint RCE bug patched by Microsoft (CVE-2026-45659)

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High-severity SharePoint RCE bug patched by Microsoft (CVE-2026-45659) 2026-05-26 at 13:56 By Zeljka Zorz Microsoft has released patches for a high-severity remote code execution vulnerability (CVE-2026-45659) in SharePoint that may be exploited in low-complexity attacks. It affects the SharePoint Server Subscription Edition, SharePoint Server 2019, and SharePoint Enterprise Server 2016. About CVE-2026-45659 CVE-2026-45659 stems from

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Microsoft Patches Exploited SharePoint Zero-Day and 160 Other Vulnerabilities

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Microsoft Patches Exploited SharePoint Zero-Day and 160 Other Vulnerabilities 2026-04-14 at 22:26 By Eduard Kovacs Experts say this is the second-largest Microsoft Patch Tuesday ever based on CVE count. The post Microsoft Patches Exploited SharePoint Zero-Day and 160 Other Vulnerabilities appeared first on SecurityWeek. This article is an excerpt from SecurityWeek View Original Source

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CISA warns of active exploitation of Microsoft SharePoint vulnerability (CVE-2026-20963)

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CISA warns of active exploitation of Microsoft SharePoint vulnerability (CVE-2026-20963) 2026-03-19 at 13:32 By Zeljka Zorz CVE-2026-20963, a remote code execution (RCE) SharePoint vulnerability Microsoft fixed in January 2026, is being exploited by attackers. The confirmation comes from the US Cybersecurity and Infrastructure Security Agency (CISA), which added the flaw to its Known Exploited Vulnerabilities

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CISA Warns of Attacks Exploiting Recent SharePoint Vulnerability

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CISA Warns of Attacks Exploiting Recent SharePoint Vulnerability 2026-03-19 at 12:02 By Eduard Kovacs The SharePoint remote code execution vulnerability CVE-2026-20963, which Microsoft patched in January, has been exploited in the wild. The post CISA Warns of Attacks Exploiting Recent SharePoint Vulnerability appeared first on SecurityWeek. This article is an excerpt from SecurityWeek View Original

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Energy sector orgs targeted with AiTM phishing campaign

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Energy sector orgs targeted with AiTM phishing campaign 2026-01-22 at 15:19 By Zeljka Zorz Organizations in the energy sector are being targeted with phishing emails aimed at compromising enterprise accounts, Microsoft warns. The attack campaign The attacks started with phishing emails with “NEW PROPOSAL – NDA” in the subject line, coming from a compromised email

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Croatian research institute confirms ransomware attack via ToolShell vulnerabilities

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Croatian research institute confirms ransomware attack via ToolShell vulnerabilities 2025-08-13 at 18:01 By Zeljka Zorz The Ruđer Bošković Institute (RBI), the largest Croatian science and technology research institute, has confirmed that it was the one of “at least 9,000 institutions worldwide” that were attacked using the Microsoft SharePoint “ToolShell” vulnerabilities. The attack happened on Thursday,

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Microsoft fixes “BadSuccessor” Kerberos vulnerability (CVE-2025-53779)

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Microsoft fixes “BadSuccessor” Kerberos vulnerability (CVE-2025-53779) 2025-08-13 at 15:20 By Zeljka Zorz For August 2025 Patch Tuesday, Microsoft has released security updates resolving 100+ security vulnerabilities in its various solutions, including a relative path traversal flaw in Windows Kerberos (CVE-2025-53779) that allows an authorized attacker to elevate privileges over a network as part of a

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August 2025 Patch Tuesday forecast: Try, try, again

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August 2025 Patch Tuesday forecast: Try, try, again 2025-08-08 at 09:30 By Help Net Security July turned into a surprisingly busy month. It started slowly with a fairly ‘calm’ Patch Tuesday as I forecasted in my last blog. Although there were 130 new CVEs addressed across all the Microsoft releases, there was only one publicly

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Storm-2603 spotted deploying ransomware on exploited SharePoint servers

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Storm-2603 spotted deploying ransomware on exploited SharePoint servers 2025-07-24 at 19:03 By Zeljka Zorz One of the groups that, in the past few weeks, has been exploiting vulnerabilities in on-prem SharePoint installation has been observed deploying Warlock ransomware, Microsoft shared on Wednesday. First attack spotted on July 7th On Saturday, Microsoft announced that attackers have

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ToolShell Attacks Hit 400+ SharePoint Servers, US Government Victims Named

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ToolShell Attacks Hit 400+ SharePoint Servers, US Government Victims Named 2025-07-24 at 12:35 By Eduard Kovacs More information has emerged on the ToolShell SharePoint zero-day attacks, including impact, victims, and threat actors. The post ToolShell Attacks Hit 400+ SharePoint Servers, US Government Victims Named appeared first on SecurityWeek. This article is an excerpt from SecurityWeek

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Microsoft Says Chinese APTs Exploited ToolShell Zero-Days Weeks Before Patch

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Microsoft Says Chinese APTs Exploited ToolShell Zero-Days Weeks Before Patch 2025-07-22 at 20:47 By Eduard Kovacs Microsoft says the Chinese threat actors Linen Typhoon, Violet Typhoon, and Storm-2603 have been exploiting the ToolShell zero-days. The post Microsoft Says Chinese APTs Exploited ToolShell Zero-Days Weeks Before Patch appeared first on SecurityWeek. This article is an excerpt

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Microsoft pins on-prem SharePoint attacks on Chinese threat actors

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Microsoft pins on-prem SharePoint attacks on Chinese threat actors 2025-07-22 at 18:54 By Zeljka Zorz As Microsoft continues to update its customer guidance for protecting on-prem SharePoint servers against the latest in-the-wild attacks, more security firms have begun sharing details about the ones they have detected. Most intriguingly, Check Point Research says that they observed

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ToolShell Zero-Day Attacks on SharePoint: First Wave Linked to China, Hit High-Value Targets

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ToolShell Zero-Day Attacks on SharePoint: First Wave Linked to China, Hit High-Value Targets 2025-07-22 at 11:44 By Eduard Kovacs More details emerged on the ToolShell zero-day attacks targeting SharePoint servers, but confusion remains over the vulnerabilities. The post ToolShell Zero-Day Attacks on SharePoint: First Wave Linked to China, Hit High-Value Targets appeared first on SecurityWeek.

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Microsoft Patches ‘ToolShell’ Zero-Days Exploited to Hack SharePoint Servers

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Microsoft Patches ‘ToolShell’ Zero-Days Exploited to Hack SharePoint Servers 2025-07-21 at 12:50 By Eduard Kovacs Microsoft has started releasing updates to fix the exploited SharePoint zero-days tracked as CVE-2025-53770 and CVE-2025-53771. The post Microsoft Patches ‘ToolShell’ Zero-Days Exploited to Hack SharePoint Servers appeared first on SecurityWeek. This article is an excerpt from SecurityWeek View Original

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Microsoft SharePoint servers under attack via zero-day vulnerability with no patch (CVE-2025-53770)

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Microsoft SharePoint servers under attack via zero-day vulnerability with no patch (CVE-2025-53770) 2025-07-21 at 00:02 By Zeljka Zorz Attackers are exploiting a zero-day variant (CVE-2025-53770) of a SharePoint remote code execution vulnerability (CVE-2025-49706) that Microsoft patched earlier this month, the company has confirmed on Saturday. CVE-2025-53770 is being leveraged to place a backdoor on vulnerable

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SharePoint Under Attack: Microsoft Warns of Zero-Day Exploited in the Wild – No Patch Available

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SharePoint Under Attack: Microsoft Warns of Zero-Day Exploited in the Wild – No Patch Available 2025-07-20 at 17:16 By Mike Lennon Enterprises running SharePoint servers should not wait for a fix for CVE-2025-53770 and should commence threat hunting to search for compromise immediately. The post SharePoint Under Attack: Microsoft Warns of Zero-Day Exploited in the

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