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STBU token exploit mints 56M tokens on Arbitrum, with MEXC freezing attacker deposits as Stobox investigates.
Author: Akshat Thakur
Steady attention without excessive speculation.
February 26, 2026 — STBU token exploit mints 56M tokens on Arbitrum after Stobox confirmed its contract was compromised, allowing unauthorized minting and transfer of tokens to an exchange wallet. The incident matters because it highlights ongoing smart contract security risks in real-world asset tokenization platforms and the importance of rapid response coordination with exchanges.
High Signal Summary For A Quick Glance
Stobox operates as a blockchain-based platform that tokenizes real-world assets and provides compliance infrastructure for security token offerings. The company operates primarily on Arbitrum and serves enterprise and institutional clients seeking regulated tokenization solutions.
The STBU token functions as a utility asset within the Stobox ecosystem, supporting payments, governance, and incentives. The company has also been transitioning toward a new equity-backed token model known as STBX to align token value with business performance. This transition has introduced changes to the platform’s token structure and infrastructure.
The STBU token exploit mints 56M tokens after an attacker accessed the contract’s minting functionality. The attacker transferred the newly created tokens to deposit wallets associated with a centralized exchange.
The exploit increased circulating supply significantly in a short period, raising concerns about market impact and token integrity. The team has not yet disclosed the exact vulnerability used in the exploit. Stobox confirmed that no further unauthorized minting is currently occurring.
Following the STBU token exploit that minted 56M tokens, the attacker sent the funds to deposit addresses on the MEXC exchange. The exchange team froze the affected wallets shortly after receiving the tokens.
The quick response prevented immediate liquidation of the exploited tokens and limited further damage to the market. Coordination between the project team and exchange operators played a key role in containment. The frozen funds remain under review as part of the ongoing investigation.
Key milestones in Stobox’s transition to STBX and the STBU exploit incident
Stobox unveils plans to transition from STBU to STBX, focusing on real-world assets and equity-backed tokenization to diversify revenue streams.
Stobox reports $1.21 million in annual revenue for 2025, with STBU contributing over 50%, and introduces a new ecosystem rewards program.
An exploit is believed to occur involving unauthorized minting activity, though the exact timing and scope remain initially unclear.
56 million STBU tokens are minted and transferred to MEXC. The team publicly confirms the incident, and MEXC blocks the affected wallets.
Stobox disables minting functions, initiates a full investigation, and works with partners to mitigate impact and secure the protocol.
Stobox has launched an internal investigation to determine how the STBU token exploit mints 56M tokens occurred. The team has not yet confirmed whether the issue was related to contract permissions, upgrade mechanisms, or other vulnerabilities.
As a precaution, the team has disabled minting functionality across the affected contracts and stated that they will share further updates as the investigation progresses. The incident highlights risks associated with upgradeable contracts and access control mechanisms in DeFi infrastructure.
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