Monero Faces Serious Blockchain Reorganization

On September 14, the Monero (XMR) network — known for its strong privacy features — once again became the target of a new attack. According to @OrangeFren on social media, the blockchain suffered an 18-block reorganization, meaning part of its transaction history was replaced, raising concerns over potential payment fraud.

This marks the second major incident in recent weeks. On August 12, Monero endured a rare 51% attack, reportedly carried out by Qubic, a project led by IOTA co-founder Sergey Ivancheglo. While Qubic claimed it was only a technical demonstration to test Monero’s security, the event shook the crypto community.

Cybersecurity experts now urge businesses and individuals accepting Monero payments to wait for more than the usual 10 confirmations to minimize double-spend risks. Yuxian of SlowMist emphasized that without addressing these reorganizations, Monero’s network will remain under constant threat — a “Sword of Damocles” scenario — even if its hash rate does not surpass 51%.

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