Over $300 million stolen in crypto hacks in Q3 2025 – Finbold report

The cryptocurrency sector recorded $306.7 million in losses from hacks during the third quarter of 2025, according to Finbold’s Q3 2025 Cryptocurrency Market ￰2￱ findings, compiled by Finbold research using data from blockchain security firm SlowMist , underscore the persistent vulnerabilities across crypto exchanges and protocols, even as the overall volume of attacks declined compared to earlier in the ￰3￱ the first quarter of the year, when the $1.5 billion Bybit incident dominated the headlines, the third quarter was shaped by a cluster of mid-sized ￰4￱ most significant was the $54 million breach at Turkish exchange BtcTurk, with the attack method still ￰5￱ incidents included $44.2 million stolen from CoinDCX due to a security flaw, $42 million drained from GMX through a reentrancy exploit, $41.5 million lost at SwissBorg because of a third-party vulnerability, and $27 million stolen from BigONE in a supply chain attack.

Combined, these events made up almost the entire quarterly total. ! function(e,n,i,s)var d="InfogramEmbeds";var o=e. getElementsByTagName(n)0;if(windowd&&windowd. initialized)windowd.

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parentNode. insertBefore(r,o)(document,"script","infogram-async","￰0￱ Notably, the Q3 total lifts the amount stolen in 2025 to $2.55 billion, ensuring that this year already ranks among the most damaging on record for the digital asset ￰6￱ in quarterly losses after the Bybit breach The third quarter figure continues the downward trend that followed the catastrophic opening months of the ￰7￱ fell from $1.77 billion in Q1 , driven almost entirely by the Bybit wallet hack, to $465 million in Q2, and further down to $307 million in Q3. ! function(e,n,i,s)var d="InfogramEmbeds";var o=e. getElementsByTagName(n)0;if(windowd&&windowd.

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src=s,o. parentNode. insertBefore(r,o)(document,"script","infogram-async","￰1￱ While the slowdown suggests improvements in exchange security and protocol risk management, it may also indicate that attackers are concentrating on smaller, targeted ￰8￱ caution that quarterly comparisons can be distorted by reporting delays, leaving open the possibility that the final totals for Q3 could be revised ￰9￱ hack losses in 2025 so far With $2.55 billion stolen across the first nine months, 2025 has already surpassed many previous full-year ￰10￱ figures illustrate how a single large-scale event, such as the Bybit hack, can dramatically shape annual statistics while still exposing systemic weaknesses across DeFi contracts, custodial services, and third-party ￰11￱ though quarterly numbers have trended lower since Q1, the cumulative damage highlights the fragile foundations of much of the ecosystem.

Q4 outlook for crypto security The absence of a billion-dollar breach in Q3 may appear to signal stability, but the underlying vulnerabilities remain ￰12￱ and protocols continue to operate in an environment where security lapses can erase hundreds of millions in value within a short ￰13￱ 2025 enters its final quarter, the key test will be whether the industry can sustain the downward trajectory in losses, or whether another large-scale incident resets the trend.