Crypto Hacks and Security, Page 6

Amtlich wirkender Briefumschlag mit rotem Wachssiegel auf einem dunklen Schreibtisch, daneben ein Messing-Brieföffner und eine Münze mit eingeprägtem Bitcoin-Zeichen

Fake German Finance Ministry Letters: Why Nobody May Demand 19 Percent VAT on Your Crypto Purchase

Since September 1, 2026, Germany's Federal Ministry of Finance has been warning about forged letters that demand 19 percent VAT on cryptocurrency purchases while citing real transactions. That tax does not exist, and this is how to spot the forgery.

29 days ago

Aufgeschlitzter Briefumschlag auf dunklem Holz, leere Papierbögen gleiten heraus, daneben eine physische Münze mit eingeprägtem Bitcoin-Zeichen

Pocket Bitcoin Data Breach: When Name, Home Address and Bitcoin Address Circulate Together

The Swiss Bitcoin service Pocket Bitcoin closed its investigation on September 3, 2026: 5,411 people affected, and for 291 of them the Bitcoin addresses they used along with copies of identity documents. Why this one data pairing has lasting effect, and what you should check with your own provider.

30 days ago

Geoeffneter Versandkarton auf einer dunklen Tuerschwelle, daneben leere weisse Versandetiketten und eine hochkant stehende Bitcoin-Muenze

Trezor Data Breach: Am I Affected and What Should I Do Now?

Trezor widened the ShipMonk data breach on September 4, 2026: around 67,000 further people affected, just over 80,000 in total, from orders placed between November 2019 and August 2021. How to check in two minutes whether you are among them, and what an exposed home address means for self-custody.

30 days ago

Stahl-Tresorwand mit zwei Fächern: das linke dauerhaft verschweißt, aus dem rechten offenen Fach rollt eine Münze mit rautenförmigem Symbol ins Licht

SAND Compensation After the Bridge Exploit: How to Get Your Frozen Tokens Back

The Sandbox intends to compensate every holder whose bridged SAND on Base and BNB Smart Chain was frozen, one for one in SAND on Ethereum. Anyone whose balance sits at an exchange need do nothing; anyone self-custodying does.

30 days ago

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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.

last month

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.

last month

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.

last month

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.

last month

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.

last month

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.

last month