Cybersecurity firm Halborn has warned of a vulnerability called “Rab13s” that could put over 280 blockchain networks at risk of zero-day exploits, potentially exposing at least $25 billion worth of crypto. The most critical vulnerability could allow an attacker to send malicious consensus messages to individual nodes, causing each to shut down and potentially enabling a 51% attack on the network. While Dogecoin, Zcash, and Litecoin have already implemented patches for the discovered vulnerabilities, hundreds of other networks remain at risk. (Read More)