SharePoint
Croatian research institute confirms ransomware attack via ToolShell vulnerabilities
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 …
Microsoft fixes “BadSuccessor” Kerberos vulnerability (CVE-2025-53779)
For August 2025 Patch Tuesday, Microsoft has released security updates resolving 100+ security vulnerabilities in its various solutions, including a relative path traversal …
August 2025 Patch Tuesday forecast: Try, try again
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 …
Storm-2603 spotted deploying ransomware on exploited SharePoint servers
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 …
Microsoft pins on-prem SharePoint attacks on Chinese threat actors
This is a developing story, new update here: Storm-2603 spotted deploying ransomware on exploited SharePoint servers As Microsoft continues to update its customer guidance for …
Microsoft SharePoint servers under attack via zero-day vulnerability (CVE-2025-53770)
This is a developing story, new update here: Microsoft pins on-prem SharePoint attacks on Chinese threat actors Attackers are exploiting a zero-day variant (CVE-2025-53770) of …
Microsoft fixes critical wormable Windows flaw (CVE-2025-47981)
For July 2025 Patch Tuesday, Microsoft has released patches for 130 vulnerabilities, among them one that’s publicly disclosed (CVE-2025-49719) and a wormable RCE bug on …
Patch Tuesday: Microsoft fixes 5 actively exploited zero-days
On May 2025 Patch Tuesday, Microsoft has released security fixes for 70+ vulnerabilities, among them five actively exploited zero-days and two publicly disclosed (but not …
Exploited: Cisco, SharePoint, Chrome vulnerabilities
Threat actors have been leveraging zero and n-day vulnerabilities in Cisco security appliances (CVE-2024-20481), Microsoft Sharepoint (CVE-2024-38094), and Google’s …
Microsoft fixes 4 exploited zero-days and a code defect that nixed earlier security fixes
September 2024 Patch Tuesday is here and Microsoft has delivered 79 fixes, including those for a handful of zero-days (CVE-2024-38217, CVE-2024-38226, CVE-2024-38014, …
May 2024 Patch Tuesday: Microsoft fixes exploited zero-days (CVE-2024-30051, CVE-2024-30040)
For May 2024 Patch Tuesday, Microsoft has released fixes for 59 CVE-numbered vulnerabilities, including two zero-days (CVE-2024-30051, CVE-2024-30040) actively exploited by …
New covert SharePoint data exfiltration techniques revealed
Varonis Threat Labs researchers have uncovered two techniques attackers can use can use for covert data and file exfiltration from companies’ SharePoint server. …
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