Fixes released for a serious Microsoft Office zero-day flaw
CSO Online 27.01.2026 23:26
Microsoft is warning admins of an Office security bypass zero day vulnerability that can be triggered simply by a user opening a document. The flaw is currently being actively exploited.
“The vulnerability is serious,” said Johannes Ullrich, dean of research at the SANS Institute. “The root cause is that Microsoft Office still supports the older OLE document format, which provides access to various OLE components. The effect is similar to what an attacker could do with Office Macros. But Office Macros are typically blocked for documents downloaded from the internet. Microsoft implemented similar protections for OLE components, but this recent exploit found a way to bypass them.”
Pyodide Sandbox Escape Enables Remote Code Execution in Grist-Core
Infosecurity Magazine 27.01.2026 16:45
Critical sandbox escape vulnerability in Grist-Core enables remote code execution via a malicious formula
Telnet-Sicherheitslücke: Wegen kritischen Risikos patchen
Heise Security 27.01.2026 11:13
Eine kritische Sicherheitslücke in telnetd der GNU InetUtils erheischt derzeit Aufmerksamkeit. Admins sollten patchen.
Microsoft Releases Patch for Office Zero Day Amid Evidence of Exploitation
Infosecurity Magazine 27.01.2026 10:45
Microsoft urged customers running Microsoft Office 2016 and 2019 to apply the patch to be protected
World Leaks Ransomware Group Claims 1.4TB Nike Data Breach
Infosecurity Magazine 27.01.2026 09:45
Nike is investigating after the World Leaks ransomware group posted a 1.4TB data dump
Apache Hadoop: Fehler im HDFS-Native-Client lässt Schadcode passieren
Heise Security 27.01.2026 09:17
Das Framework Apache Hadoop ist verwundbar. Attacken können im Kontext des HDFS-Dateisystems geschehen. Ein Sicherheitspatch ist verfügbar.
Microsoft bringt Notfallpatch: Office-Nutzer werden über Zero-Day-Lücke attackiert
Golem 27.01.2026 07:38
Eine gefährliche Sicherheitslücke betrifft alle gängigen Office-Versionen. Angesichts der aktiven Ausnutzung sollten Anwender zügig patchen. (Sicherheitslücke, Microsoft)