Microsoft links SolarWinds WHD exploits to RCE, lateral movement, and domain compromise in multi-stage attacks.
Attacks targeting SolarWinds Web Help Desk instances in December 2025 might have exploited recently patched vulnerabilities as zero-days.
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 ...
Exploitation of CVE-2025-40551, an RCE flaw affecting SolarWinds Web Help Desk, appears to be spreading, and defenders are on high alert.