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Attacks targeting SolarWinds Web Help Desk instances in December 2025 might have exploited recently patched vulnerabilities as zero-days.

Researchers at Huntress and Microsoft have shared findings from their analysis of a new SolarWinds Web Help Desk vulnerability.

Microsoft's Defender Security Research Team has observed threat actors actively exploiting internet-exposed SolarWinds Web Help Desk instances in multi-stage intrusions that led to lateral movement ...