A major municipal bond market website valued at $4.3 trillion was targeted by a ransomware attack, disrupting debt document publication for state and local government borrowers. The site MuniOS, operated by ImageMaster LLC, remains offline, impacting market access. #MuniOS #ImageMasterLLC
Information
- Victim: MuniOS | MuniOS
- Website: munios.com
- Country: USA
- Date Reported: 2025-10-16
Keypoints
- The municipal bond market website valued at $4.3 trillion was hit by a ransomware attack.
- The attack has caused the site MuniOS to be offline for several days.
- Disruption in publishing debt documents affects state and local government borrowers.
- The site is operated by technology firm ImageMaster LLC.
- The attack hampers access to the municipal bond market for borrowers.