Fusaka Upgrade Reduces Ethereum Fees, Sparks Surge in Address Poisoning Scams

The Fusaka upgrade in December 2025 significantly reduced Ethereum’s transaction fees, enabling a surge in address poisoning attacks according to MEXC.

These attacks, particularly targeting stablecoins like USDT, USDC, and ETH, have increased dramatically, with dust transfers rising by over 600% in some cases as reported by Phemex.

While the success rate of such attacks remains low, the sheer volume of attempts has raised concerns about network security and tokenomics according to AInvest.

The Fusaka upgrade, which improved Ethereum’s Layer 2 throughput and reduced gas costs, has inadvertently made it easier and cheaper for attackers to launch large-scale address poisoning campaigns according to MEXC. By sending tiny, near-zero-value transfers to mimic legitimate transactions, scammers attempt to trick users into sending funds to the wrong address as warned by CryptoPotato. The low cost of these attacks has enabled a sharp rise in their frequency, particularly for stablecoins used in high-volume trading.

Ethereum’s gas fee drop, now at a fraction of pre-upgrade levels, has had broader implications for validator earnings and network security incentives according to AInvest. The reduced cost of executing spam and low-value transactions has distorted key network metrics, making it harder to distinguish genuine usage from malicious activity. This has led to growing concerns among researchers and security experts about the integrity of Ethereum’s economic model.

How Do Address Poisoning Scams Work?

Address poisoning involves attackers sending small amounts of crypto to user wallets to mimic a contact’s real address according to Phemex. These transactions are designed to appear in transaction history and confuse users when initiating new transfers. For example, a user might intend to send funds to a known contact but instead copy a similar address from the transaction history of a dust transfer as reported by BitDigest. This exploit is particularly effective when using wallets that display shortened or truncated addresses.

The rise in such scams has been most pronounced for stablecoins like USDT and USDC. In the 90 days after the upgrade, malicious USDT dust transfers under $0.01 rose by 612% according to CryptoPotato. Similar attacks on USDC and ETH also surged by 473% and 470%, respectively according to MEXC. These figures suggest that attackers are leveraging automated bots to scale their efforts and maximize the chance of successful phishing.

What Can Investors and Users Do to Protect Themselves?

Users are advised to always verify full destination addresses before initiating a transfer according to Phemex. This includes double-checking for typos or subtle differences in characters that could indicate a fake address. Security tools like ENS (Ethereum Name Service) and Etherscan’s private name tags are recommended for mitigating these risks according to MEXC.

Institutional participants and network validators are also re-evaluating their strategies in light of the Fusaka upgrade as reported by BitDigest. The changes in fee structures have led to a shift in staking efficiency, validator consolidation, and overall network economics. As digital markets scale, the need for secure and reliable settlement layers becomes more critical as reported by BitDigest.

Security monitors at Etherscan have issued warnings about the rising number of address poisoning attacks according to BitDigest. While the success rate of such attacks remains relatively low, the sheer volume of attempts poses a risk to both retail and institutional users. Analysts are closely monitoring the impact of these trends on Ethereum’s tokenomics and user behavior.