Pierluigi Paganini
August 13, 2026
Attackers are exploiting SharePoint flaw CVE-2026-55040 after a public PoC was released, allowing unauthenticated users to impersonate administrators. Attackers started exploiting CVE-2026-55040 (CVSS score of 9.1), a critical SharePoint authentication bypass patched in July, within days of Rapid7 releasing a public proof-of-concept on August 12. The vulnerability allows an unauthenticated attacker impersonate any SharePoint user […]
Pierluigi Paganini
August 04, 2026
Swiss Federal IT Agency FOITT says attackers exploited SharePoint flaws to compromise about 200 accounts. Servers are being rebuilt as investigations continue. Switzerland’s Federal Office for Information Technology and Communications, known as BIT or FOITT, disclosed that unknown attackers had compromised approximately 200 accounts on its on-premises SharePoint servers. The FOITT said the unknown attackers […]
Pierluigi Paganini
July 23, 2026
U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds SharePoint and Check Point flaws to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added SharePoint and Check Point flaws to its Known Exploited Vulnerabilities (KEV) catalog. Below are the flaws added to the KeV catalog: The first flaw added to the KeV […]
Pierluigi Paganini
May 27, 2026
A critical vulnerability, tracked as CVE-2026-45659, in Microsoft SharePoint can allow attackers to achieve remote code execution with little effort. Microsoft released security updates to patch a high-severity SharePoint vulnerability, tracked as CVE-2026-45659 (CVSS score of 8.8), that could allow remote code execution. The flaw does not require complex conditions for exploitation, making it a […]
Pierluigi Paganini
April 15, 2026
Microsoft Patch Tuesday security updates for April 2026 fixed 165 vulnerabilities, including an actively exploited SharePoint zero-day. Microsoft Patch Tuesday security updates addressed 165 vulnerabilities, making it one of the largest updates by CVE count. One of the most interesting flaws fixed by the IT giant is a critical SharePoint zero-day, tracked as CVE-2026-32201, already […]
Pierluigi Paganini
July 23, 2025
Microsoft linked SharePoint exploits to China-nexus groups Linen Typhoon, Violet Typhoon, and Storm-2603, active since July 7, 2025. Microsoft confirmed that China-linked groups Linen Typhoon, Violet Typhoon, and Storm-2603 exploited SharePoint flaws for initial access as early as July 7, 2025. “As of this writing, Microsoft has observed two named Chinese nation-state actors, Linen Typhoon […]
Pierluigi Paganini
July 22, 2025
While SentinelOne did not attribute the attack to a specific threat actor, The Washington Post linked it to China-nexus acors. On July 19, Microsoft confirmed active exploitation of a zero-day vulnerability, tracked as CVE-2025-53770 in on-prem SharePoint Servers. The IT giant issued emergency patches for SharePoint Subscription Edition and 2019, with 2016 updates pending. Microsoft […]
Pierluigi Paganini
July 21, 2025
Microsoft patched an exploited SharePoint flaw (CVE-2025-53770) and disclosed a new one, warning of ongoing attacks on on-prem servers. Microsoft released emergency SharePoint updates for two zero-day flaws, tracked as CVE-2025-53770 and CVE-2025-53771, exploited since July 18 in attacks dubbed “ToolShell.” Both vulnerabilities only impact on-premises SharePoint Servers, threat actors could chain them for unauthenticated, […]
Pierluigi Paganini
July 21, 2025
Microsoft warns of ongoing active exploitation of a SharePoint zero-day vulnerability, tracked as CVE-2025-53770. Microsoft warns of a SharePoint zero-day vulnerability, tracked as CVE-2025-53770 (CVSS score of 9.8), which is under active exploitation. Unfortunately, the flaw has yet to be addressed. The vulnerability is a deserialization of untrusted data in on-premises Microsoft SharePoint Server, an […]
Pierluigi Paganini
July 23, 2020
Expert release a PoC exploit code for a recently addressed critical flaw in Microsoft SharePoint, .NET Framework, and Visual Studio. CVE-2020-1147 is a critical vulnerability in .NET Framework, SharePoint, and Visual Studio that was recently addressed by Microsoft with the release of the July 2020 Patch Tuesday security updates. The flaw is caused by the lack […]
