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2026 DIAN Colombia — 18M records (appointment platform breach)

2026 18.0M records affected Share on X

Data compromised

Names, national IDs, emails, phone numbers

Technical writeup

Colombia's tax authority DIAN suffered breach of agendamiento.dian.gov.co appointment scheduling platform. Hacker 'ArcRaidersPlayer' exploited known vulnerability in CIEL Ingeniería-developed system. ~18M records, 16 GB: names, ID numbers, emails, phones. Exploit offered for sale. DIAN confirmed incident March 6; appointment system disabled. Prosecutor investigating extortion.

Root cause

Vulnerability in third-party appointment platform; CIEL Ingeniería

References