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Monero Faces Major 51% Attack from Qubic Mining Pool

Monero Faces Major 51% Attack from Qubic Mining Pool

CoinomediaCoinomedia2025/08/12 13:40
By:Aurelien SageAurelien Sage

Qubic dominates Monero’s hashrate, enabling a 51% attack and risking network integrity. Experts warn of $75M daily costs.Potential Damage from a 51% AttackThe Cost of Maintaining Control

  • Qubic controls most of Monero’s hashrate.
  • 51% attack allows chain rewrites and transaction censorship.
  • Experts estimate $75M daily to sustain attack.

Monero’s blockchain is under serious threat after the Qubic mining pool allegedly achieved majority control of its hashrate, sparking what appears to be a successful 51% attack. According to SlowMist founder reports, this unprecedented move has already resulted in a major chain reorganization, allowing Qubic to alter blockchain history at will.

When a mining pool gains over half of a network’s computational power, it can manipulate transactions, reverse transfers, and even block new ones from being confirmed. This undermines the network’s core promise of decentralization and trustless operation.

Potential Damage from a 51% Attack

With its current dominance, Qubic has the ability to execute double-spend attacks—where the same funds are spent twice—effectively defrauding exchanges and merchants. It can also selectively censor transactions, freezing certain addresses out of the network entirely.

This attack strikes at the heart of Monero’s privacy-focused ecosystem, which is built on the idea of immutable, anonymous transactions. A prolonged 51% attack could not only cause financial damage but also harm user confidence and adoption.

SlowMist founder said the 51% attack on Monero by the Qubic mining pool appears successful. Qubic now controls most of the network’s hashrate, with a major chain reorg detected. With its dominance, Qubic can rewrite blockchain history, launch double-spend attacks, and censor any… pic.twitter.com/fI4iqbc8Ai

— Wu Blockchain (@WuBlockchain) August 12, 2025

The Cost of Maintaining Control

Ledger CTO has estimated that sustaining such an attack could cost around $75 million per day. While this figure reflects the immense resources required, the potential profit from manipulating transactions on a major cryptocurrency like Monero could still be a strong incentive for the attackers.

Security experts warn that if the network cannot quickly redistribute its hashrate among more honest participants, Monero may face long-term damage to its reputation and stability.

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  • Monero Faces Major 51% Attack from Qubic Mining Pool
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Disclaimer: The content of this article solely reflects the author's opinion and does not represent the platform in any capacity. This article is not intended to serve as a reference for making investment decisions.

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