Electrum Wallet Patches Critical Fee Attack Vulnerability
Electrum releases version 4.8.3 to address a security flaw exploited by malicious servers to steal user funds.
Electrum releases version 4.8.3 to address a security flaw exploited by malicious servers to steal user funds. Bitcoin (BTC) is trading at $80,788.00. This is an original TLT brief synthesising 2 outlets (The Cryptonomist, Bitcoin.com), plus live market data, as of Sun, 25 Oct 2026 04:00:04 UTC.
The vulnerability allowed attackers to manipulate transaction fees to trick users into signing payments to thieves, posing a significant risk to Electrum wallet users and undermining trust in the platform's security.
- Electrum fixed a critical vulnerability in version 4.8.3
- Attackers exploited the flaw to steal funds through fee manipulation
- Users urged to upgrade immediately to protect against theft
Multiple outlets, including The Cryptonomist and Bitcoin.com, confirm that Electrum released version 4.8.3 on October 24, 2023, to address a critical security flaw. The vulnerability allowed malicious servers to swap legitimate transactions with fraudulent ones when users attempted to increase transaction fees, resulting in reported cases of stolen funds. While both outlets highlight the severity of the issue, Bitcoin.com provides additional technical detail about how the attack functioned, describing it as a 'quiet swap' of transactions that occurred without user awareness.
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- Electrum Wallet Patches Critical Fee Attack Vulnerability — this brief
Electrum has addressed a critical security vulnerability in its wallet software that allowed attackers to exploit transaction fee adjustments to steal user funds. The vulnerability was discovered after reports of users losing money through malicious fee manipulation attacks.
The attack worked by allowing malicious servers to intercept legitimate fee adjustment requests and replace them with fraudulent transactions that transferred funds to the attackers. Users, believing they were simply increasing transaction fees, would inadvertently approve the theft.
The Cryptonomist and 
Bitcoin.com both report that Electrum released version 4.8.3 on October 24, 2023, to fix the issue. The update is critical as earlier versions of Electrum are vulnerable to the attack. Users are strongly advised to upgrade to the latest version to protect their funds.
The vulnerability highlights the risks associated with cryptocurrency wallet software, particularly when interacting with untrusted servers. This incident underscores the importance of maintaining up-to-date software and being vigilant about potential security threats in the cryptocurrency space.
As of the latest data, the Bitcoin network hashrate stands at 1073 EH/s with a difficulty of 140.6T. The overall cryptocurrency market remains relatively stable with a total market cap of $2.78T, while Bitcoin is trading at $80,830, showing a minor 24-hour decline of 0.15%.
Since this brief published about 10 hours ago, Bitcoin (BTC) has moved from $80,830.00 to $80,788.00 — -0.05%.
The chart plots BTC's price: grey is the move before this brief published, the vertical dashed line marks the moment it published, the horizontal dashed line is the price then, and the coloured area is the move since — from TLT's market data (daily resolution). It shows what happened after the news, not that the news caused it; many factors move prices. Not financial advice.
At today's peer-to-peer rate, 1 BTC ≈ ₦111.46M (about $80,788.00), down 0.1% over 24 hours. The naira itself trades about 4.1% above the official rate on the P2P market, so a Nigerian buyer's effective cost differs from the headline dollar price.
Live market data
Current prices for the asset in this story — live, source-stamped, updated every 15 minutes.
Figures and sectors in this story, checked live against on-chain aggregators · October 25, 2026.
TLT reads these figures directly from on-chain aggregators (DeFiLlama, mempool.space) at build time — independent of what any outlet reported. Sector totals aggregate every protocol DeFiLlama tracks in that category. Values are live and will change.
Electrum Wallet Patches Critical Fee Attack Vulnerability — questions & answers
What is the vulnerability in Electrum?
The vulnerability allows malicious servers to manipulate transaction fees to trick users into signing payments to attackers.
How can users protect themselves?
Users should upgrade to Electrum version 4.8.3 immediately to protect against the attack.
Has anyone lost money due to this vulnerability?
Yes, at least one user reported losing money through this attack before the patch was released.
How much is 1 Bitcoin worth in naira today?
About ₦111.46M at the live peer-to-peer (P2P) USDT rate, which is what Nigerians typically trade at — equivalent to roughly $80,788.00. The naira price moves with both BTC's US-dollar price and the USDT/NGN rate; use our Bitcoin in naira page for any amount.
Has Bitcoin's price moved since this brief was published?
BTC is down 0.05% since this brief first published — trading at $80,788.00 now versus $80,830.00 at publication. TLT re-checks this figure against CoinGecko and Binance every 15 minutes.
Which outlets reported this story?
This is an original TLT brief that synthesises reporting from The Cryptonomist, Bitcoin.com, with the key figures cross-checked for agreement across them. It is not a copy of any one article — follow the source links above for the original reporting.
Original summary — not financial advice. This is an original TLT brief that summarises a development reported elsewhere and adds live market data for context; it is not the original article and reproduces no part of it. Follow the source link above for full details. Crypto is volatile and high-risk — always do your own research.