Cybersecurity Headlines Microsoft Patch problems, Sandworm hits Poland, Dresden Museum cyberattack
24 snips
Jan 26, 2026 Outlook PST and Windows 11 boot issues after Microsoft's patches. A destructive Sandworm-linked attack hits Poland's power infrastructure. A Dresden museum's ticketing and phone systems go offline due to a network intrusion. New actively exploited vulnerabilities added to CISA's KEV list and fresh claims of voice-phishing breaches circulate.
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Patch Frozen Outlook Immediately
- Apply Microsoft's emergency Outlook update if you use PSTs stored in cloud locations to avoid Outlook Classic failing to open.
- Check whether your enterprise uses Classic Outlook and prioritize patches released outside regular Patch Tuesday cycles.
Patch Tuesday Caused Boot Failures
- January Patch Tuesday updates caused some Windows 11 systems to report unmountable boot volume errors and black screens of death.
- The issue affects Windows 11 25H2 and all editions of 24H2 and requires manual recovery on impacted devices.
Sandworm Likely Behind Poland Grid Attack
- ESET attributes a late-December Poland power-grid attack to Sandworm and names the wiping malware DinoWiper.
- The attack coincided with the 10th anniversary of Sandworm's Ukraine power-grid blackout operation.