Litecoin (PoW) experienced its first-ever deep rollback of 13 blocks due to manual intervention, wiping out 3 hours of transaction history. The incident was triggered by a hacker exploiting a vulnerability in the MWEB privacy layer to forge a legitimate withdrawal request, aiming to mint fake coins and dump them on a DEX. Nodes without the patch had already packaged these transactions, while other nodes were hit with DoS attacks and went offline, causing a chain split in Litecoin. If mining continued on the 'wrong' fork, the hacker could have minted unlimited fake coins, potentially crashing Litecoin to zero. In response, the Litecoin core team urgently coordinated with major mining pools to install the patch and collectively redirected hash power back to the 'correct' chain. All transactions during this period were invalidated.