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Qubic Halts Network After $1.3M Theft Hits 1,404 Wallets

6 min read
Large official dark Qubic icon and lowercase wordmark on an off-white stone sign beside a smaller unbranded greyscale leather wallet with a steel clasp, against teal and coral panels.

TL;DR

  • Qubic says an attacker drained about 2.94 trillion QU from 1,404 wallets during a 104-minute attack spanning October 17 and 18.
  • The project says 87.1% remains immobilized on its halted network and MEXC froze the account receiving the remaining 12.9%.
  • Qubic identifies affected seed-generation environments and a version 4.26.4 fix; a recovery decision rests with its Computor quorum.

CASABLANCA, October 19, 2026

Qubic halted transaction processing after an attacker drained 1,404 wallets of about 2.94 trillion QU, valued near $1.3 million, as a weakness in wallet-seed generation left holders facing both stolen balances and a network-wide transfer freeze.

The project disclosed the incident on October 18, saying the attack ran from 23:42 UTC on October 17 to 01:26 UTC on October 18. Its account places most stolen tokens on the halted network and the rest in a frozen MEXC account, with a recovery decision still pending.

Bitget’s historical QUBIC data showed an October 17 close of $0.0000004764 and $1.04 million in daily volume. That close was about 31.6% below September 30’s $0.0000006967. These completed sessions largely precede the attack; they do not measure its full market impact.

In its primary incident thread, Qubic attributed the unauthorized transfers to insufficiently random seeds. The project separately located the weakness in seed generation, rather than the network protocol. That is the team’s preliminary explanation, pending its promised technical report.

The incident follows other cases in which weak secret generation put existing balances at risk, including the previously reported Coldcard seed-generation warning. The common security question is whether the secret controlling a wallet was unpredictable when created, even if the blockchain subsequently processes valid signatures correctly.

Qubic: USD per 1 million QU

QUBIC
1 month: September 18 to October 17, 2026; sampled UTC sessions
$0.4764
+27.9%
Sep 18 - Oct 17 | High $0.6967 • Low $0.371

Source: Bitget, verified in its public browser page around 00:08 UTC October 19. Each price is multiplied by one million for readability, so the displayed unit is USD per one million QU. Samples span the latest 30 completed sessions displayed; this is not a live post-incident price feed.

Qubic theft totals 2.94 trillion QU

The strongest available loss count is Qubic’s own disclosure: 1,404 wallets and approximately 2.94 trillion QU moved during a 104-minute window. Wallets are addresses or accounts in this tally, not a verified count of individual people. One person can control several wallets.

The Defiant’s report, republished by Crypto News, calculated a value near $1.26 million using CoinGecko’s price at 15:03 UTC on October 18. The rounded $1.3 million headline describes the value of tokens taken, rather than demonstrated proceeds from sales or a final unrecoverable loss.

As of this article’s 00:06 UTC October 19 loss-impact check, Qubic’s containment update said 87.1% never left the network. It said the remaining 12.9% reached MEXC, which froze the receiving account within about an hour. Those percentages describe the same stolen-token pool and should not be added as separate losses.

MEXC’s own announcement confirms suspension of QUBIC deposits and withdrawals at the project’s request. That notice does not independently publish the receiving account’s balance or confirm completed restitution.

The public Qubic analytics dashboard also displayed tick 85,371,949 during the check, matching the halt point identified by the team. Its entity activity page showed transfers to MEXC during the incident window, but those entries alone do not prove which transfers belonged to the attacker.

The reviewed disclosure did not provide a complete victim-address and transaction-hash list that would allow this publication to independently reconstruct the entire theft. No separate, verified attack wave or additional loss total was established in the reviewed material.

Qubic flags Apple-created wallet seeds

Qubic’s affected-seed warning identifies three creation environments: any browser on an iPhone or iPad before October 18, 2026; Safari on a Mac before that date; and the Qubic iOS app before July 2025.

The relevant detail is where and when the seed was generated. Simply opening an existing wallet on an Apple device is different from creating its controlling secret there. The disclosure does not establish that unrelated Apple wallets or other cryptocurrencies share the weakness.

A wallet seed is the secret from which access to its funds is derived. Qubic’s official setup lesson describes its seed as a 55-character recovery key. A long secret can still be vulnerable if the process choosing its characters leaves too few possibilities for an attacker to test.

The project says version 4.26.4 corrects seed generation. That statement concerns creating secrets going forward. Installing an update does not retroactively replace the secret controlling an existing wallet, and the announcement should not be interpreted as repairing every previously generated seed.

The full technical report remains outstanding in the reviewed update. It should clarify the affected generation paths and the scope of exposure beyond the wallets already drained. The affected-environment list and observed victim count answer different questions: potential exposure and confirmed incident impact.

That distinction also limits what can be inferred from a wallet that still shows a balance. The reported tally counts wallets already emptied during the observed window; it is not a census of every secret created by the affected software. A network halt temporarily restricts movement without establishing that an old seed is unpredictable.

Qubic recovery rests with Computor quorum

Qubic says its Computors coordinated the protective halt. Stopping transactions can contain funds, but it also prevents unaffected holders from transferring their balances. Protocol operation and wallet security therefore have separate consequences in this incident.

Containment also differs from reversal. The earlier Tectonic rollback on Cronos illustrates how a recovery mechanism can change the final loss accounting. Qubic’s reviewed update announces a halt and an exchange-account freeze, without announcing an equivalent rollback or completed repayments.

In its recovery statement, the team said it was identifying affected identities and preparing options for the Computor quorum. A Discord poll was gathering community views. That consultation is not itself an adopted compensation plan.

Any recovery accounting will need to distinguish tokens held on the network, assets controlled through an exchange account and balances actually returned to victims. A percentage described as contained can be meaningful evidence of the response while still leaving ownership, release procedures and timing unresolved. Those are separate milestones for holders assessing the outcome.

Qubic asked affected holders to file police or cybercrime reports with their wallet ID, lost amount and explorer transaction link, saying formal reports help exchanges maintain freezes. It also warned against unsolicited recovery messages, seed requests and fee-based recovery offers.

Fear & Greed Index

Observed October 19, 2026
59 Greed

Alternative.me displayed 59, classified as Greed, versus 53 previously when checked around 00:04 UTC. This Bitcoin-focused sentiment measure does not track Qubic’s recovery.

The next developments to watch are the quorum’s recovery decision, evidence of returned funds and an announced resumption of transactions. The reviewed disclosures do not settle the repayment terms, restart time or final unrecoverable loss.

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Fact-checked by: Daily Crypto Briefs Fact-Check Desk

Frequently Asked Questions

How much was stolen in the Qubic wallet hack?

Qubic reported about 2.94 trillion QU drained from 1,404 wallets. The Defiant valued those tokens at about $1.26 million using October 18 prices, commonly rounded to $1.3 million. That is a valuation, not confirmed cash proceeds.

Which Qubic wallet seeds are affected?

Qubic lists seeds created before October 18, 2026, in any browser on an iPhone or iPad, or in Safari on a Mac, plus seeds created in its iOS app before July 2025. The warning concerns Qubic seed creation, not every Apple wallet or cryptocurrency.

Have Qubic victims been repaid?

The reviewed October 18 disclosure describes funds immobilized on-chain or in a frozen MEXC account. It does not announce completed repayments. Qubic says a resolution is for its Computor quorum to decide.

Does Qubic version 4.26.4 repair an existing weak seed?

The project says version 4.26.4 corrects seed generation. Updating software does not change the secret underlying an existing wallet, so the announcement should not be read as making an old weak seed stronger.

Why did Qubic stop processing transactions?

Qubic says its Computors coordinated a halt at tick 85,371,949 to contain the stolen tokens. The halt also prevents ordinary transfers. The reviewed update did not provide a restart time.