As of today, Monday, August 11, 2025, there has been no successful 51% attack on the Monero network.
Monero's network is operating as normal, and there are no credible reports or widespread alarms within the community about a major security breach or a successful 51% attack.
Why You Might Be Asking
The topic of a 51% attack on Monero is one that comes up periodically, often in the context of:
* Hypothetical Scenarios: Discussions about the theoretical vulnerability of any proof-of-work blockchain.
* The Mining Landscape: The ongoing debate about Monero's CPU-friendly mining and whether its decentralized hashrate is robust enough to prevent such an attack from a well-funded actor.
* Historical Attempts: There have been a few smaller, less significant events in the past (years ago) where a single mining pool briefly exceeded 50% of the network's hashrate, but these were temporary and did not result in a malicious attack. The community's response was swift, and miners were encouraged to switch pools to re-decentralize the hashrate.
Monero's Defenses Against a 51% Attack
Monero's network is specifically designed to be resilient against this type of attack, which is why a successful one has never occurred. Its main defenses are:
* ASIC-Resistant Proof-of-Work (RandomX): This is the key. Because the network is mined by millions of general-purpose CPUs globally, it would be incredibly difficult and expensive for a single entity to acquire more than 50% of the total network hashrate. It's much harder to acquire millions of distributed CPUs than it is to build a few warehouses full of specialized Bitcoin ASICs.
* Vigilant Community: The Monero community is highly security-conscious. If any mining pool were to approach or temporarily exceed 50% of the network hashrate, it would be widely publicized, and miners would quickly switch pools to balance the network, as has happened in the past.
Rest assured, for your purposes, the most recent news is that the Monero network remains secure, decentralized, and has not been compromised by a 51% attack.
