Crypto Hacks and Security, Page 5

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Bitcoin Lost in a Wallet Hack: What Tax Applies in Austria?

Bitcoin lost to hackers? In Austria, the theft of privately held coins generally does not create a capital loss you can use for tax. Only a later payout can change that.

25 days ago

Geschlossenes Schleusentor aus vernietetem Stahl vor einem dunklen Wasserkanal, davor ein Stau schwerer Metallmuenzen mit eingepraegtem Bitcoin-Zeichen

Core DAO: CORE Transfers Frozen, Emergency Hard Fork Announced. What Our Chain Measurement Shows

Several trading venues have halted deposits and withdrawals on the Core DAO network while the project prepares an emergency hard fork after excessive validator rewards. Our own measurement of the chain dates two addresses that appeared on August 28 and built their last block on August 31 at 5:50 UTC, and shows a block cadence that never paused for longer than five seconds.

26 days ago

Leergelaufener gusseiserner Trog in einer dunklen Werkhalle, der Ablasshahn steht offen, ein letzter Tropfen hängt daran, davor eine Münze mit Bitcoin-Zeichen

Balancer V1 Legacy Pools: A Rounding Error Costs $234,000, and Nobody Can Pause the Pools

On August 31 an attacker drew around $234,000 out of a Balancer V1 pool through a rounding error. The old contracts cannot be paused, so liquidity providers have to exit themselves.

26 days ago

Altes manuelles Vermittlungs-Schaltpult im dunklen Kontrollraum mit gezogenen Steckern und erloschenen Leuchtanzeigen, davor eine schwere Metallmünze mit Bitcoin-Zeichen

Switchboard Oracle Compromised: Why Price Feeds on Sui, Aptos, IOTA and Movement Have Stopped

The oracle provider Switchboard halted its price feeds on Sui, Aptos, IOTA and Movement on August 29, 2026, after a manipulated price allowed around 4.94 million VUSD to be minted. 45 users were liquidated, and Full Sail suspended deposits and withdrawals.

27 days ago

Alter Lederkoffer in einer dunklen Bahnhofshalle mit zwei identischen blanken Messing-Gepäckanhängern, davor eine Münze mit eingeprägtem Bitcoin-Zeichen

Clipboard Attack: How Malware Swaps the Wallet Address You Copied

A clipper replaces the receiving address between copying and pasting with the attacker’s, and your wallet’s checksum notices nothing. What Microsoft and the Federal Office for Cybersecurity have documented, and which check really makes the attack come to nothing.

27 days ago

Blick in einen leergelaufenen stählernen Getreidespeicher, dessen offene Bodenklappe einen letzten dünnen Strom Münzen mit Bitcoin-Zeichen in die Dunkelheit rieseln lässt

More Markets Exploit: How a Liquid Staking Token and E-Mode Pulled $9.3 Million Out of a Lending Market

Around 15.5 million WFLOW drained from the lending market More Markets on August 31, 2026, roughly $9.3 million by Blockaid's estimate. The route ran through a liquid staking token used as collateral and through E-Mode, and both building blocks sit in protocols you know.

28 days ago

Messingstempel mit leerer Praegeflaeche neben einem aufgeplatzten roten Wachssiegel, aus dessen Hohlraum eine Muenze mit Bitcoin-Zeichen gleitet

Fake AML Checks for Crypto Wallets: How to Spot the Scam Sites

Fraudulent websites pose as money-laundering screening services for crypto addresses and ask you to connect your wallet. A genuine check needs only the public address, and three of the domains named by Malwarebytes still respond twelve days later.

28 days ago

Aufgeklapptes Steckmodul in einer Reihe gleich aussehender schwarzer Module, aus dem Hohlraum rollen Münzen mit eingeprägtem Bitcoin-Zeichen auf die Werkbank

Browser Extensions as Wallet Thieves: How a Sports App Became a Seed Phrase Collector

In August 2026 the security firm Socket disclosed two separate campaigns: 40 confirmed malicious Firefox extensions and 19 for Chrome and Edge, all of them from the official marketplaces. Nine of them were harmless sports apps that only turned into wallet thieves through an update.

28 days ago

Eine schwere eiserne Gliederkette in einer dunklen Halle, von einem massiven Stahlbolzen zwischen zwei Gliedern zum Stillstand gezwungen, darauf liegen Münzen mit eingeprägtem Bitcoin-Zeichen

Cronos chain halt: how a Tectonic exploit emptied the chain's largest lending market

On August 30, 2026, the validators of the Cronos chain halted block production after an attacker had emptied the lending market Tectonic via an inflated TONIC price. What is established, why the damage figures diverge, and what you can check if your balance sits on a haltable chain.

28 days ago

Ungebrandete Metall-Zahlkarte, halb unter eine schwere Stahlklappe geschoben, davor eine Muenze mit eingepraegtem Bitcoin-Zeichen

Crypto Cards: Where Your Card Balance Really Sits and What the August 28 Solana Exploit Reveals About It

An attack on a card balance contract on Solana took the loaded balance from 1,685 users while their wallets stayed untouched. The case shows why it matters whether your crypto card holds funds as e-money at a licensed institution or in a smart contract.

29 days ago