The cryptocurrency world has been shaken by claims from Qubic, a venture led by IOTA co-founder Sergey Ivancheglo, that it has allegedly seized majority management of the Monero blockchain’s hashrate. According to the workforce, this milestone was reached on August 11, 2025, after a centered push that lasted a number of weeks. The growth has opened up issues over Monero’s community safety and the vulnerability of mid-cap Proof-of-Work blockchains to incentive-driven takeovers.
How Has The Monero Situation Played Out?
According to the Qubic workforce, the assault was carried out utilizing a “helpful proof‑of‑work” (uPoW or UPoW) mannequin. Miners channel their CPU mining energy towards Monero; Qubic then converts the mined XMR into USDT to purchase and burn QUBIC tokens or reward its personal validators. This financial design drew a considerable portion of the Monero mining energy away from different swimming pools, escalating from below 2% in May and culminating within the claimed 51% threshold by August. Qubic describes this as a strategic experiment not supposed to destroy Monero however to check how incentives can be utilized to shift management over a community.
According to experiences and mentions on the social media platform X, there was certainly a six-block reorganization on the Monero blockchain, which confirmed that Qubic does management a big sufficient hashrate.
If Qubic succeeded in gaining and sustaining majority management (over 50%) of the blockchain’s hashrate, the implications might be extreme. In such a state of affairs, Qubic might probably censor transactions, carry out double-spends, and reorganize blocks at will. Such energy would permit them to reverse confirmed transactions and undermine the blockchain’s integrity.
What Have Experts Said?
In response, the Monero developer group famous that chain reorganizations alone don’t affirm a real 51% assault. Luke Parker (lead dev at SeraiDEX) acknowledged {that a} six‑block‑deep community reorg with block orphaning doesn’t imply a 51% assault was profitable. However, it does imply a mining group with a excessive quantity of hashrate received fortunate.
The CTO of Ledger, Charles Guillemet, additionally raised alarms concerning the incident. Guillemet warned that sustaining such a dominance might price $75 million per day in gear and operations, and that even which may compromise confidence in Monero practically immediately.
Indeed, many within the Monero group are skeptical that Qubic actually sustained such management. According to a put up by blockchain engineer Leonardo Faoro, which was additionally reposted on the social media platform X by Monero founder Riccardo Spagni, miners don’t want a full 51% hashrate to set off reorgs. They solely require about 35% of the hashrate, together with lucky timing.
Monero’s market efficiency shortly mirrored the unease within the hours following Qubic’s declare of majority management. This unease noticed its value fall to as little as $245. At the time of writing, Monero is buying and selling at $247, down by 5.3% and 15.2% up to now 24 hours and 7 days, respectively.
Qubic’s native token, however, skilled the alternative trajectory. At the time of writing, QUBIC is up by 20.5% up to now 24 hours.
Featured picture from iStock, chart from Tradingview.com
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