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Blockchain CBSP Exam - Topic 5 Question 129 Discussion

Which smart contract vulnerability allows an attacker to make a profit off a smart contract cryptocurrency exchange like Bancor?
C) Race Conditions
A) Arithmetic
B) Access Control
D) Reentrancy

Blockchain CBSP Exam - Topic 5 Question 129 Discussion

Actual exam question for Blockchain's CBSP exam
Question #: 129
Topic #: 5
[All CBSP Questions]

Which smart contract vulnerability allows an attacker to make a profit off a smart contract cryptocurrency exchange like Bancor?

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Suggested Answer: C

by Afton at Jun 21, 2026, 03:22 PM

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Haley
17 days ago
But what about B) Access Control? Weak permissions can also be exploited.
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Meghan
22 days ago
I agree, D) Reentrancy makes sense. It can drain funds.
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Louann
27 days ago
I think it's D) Reentrancy. It's a common issue.
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An
1 month ago
I heard B) Access Control can also lead to big problems, though.
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Carolann
1 month ago
100% agree with D) Reentrancy, it's caused so many hacks!
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Misty
1 month ago
Wait, are we sure it's not C) Race Conditions? Seems like a tricky one.
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Jules
2 months ago
I thought it was A) Arithmetic issues? Those are pretty common too.
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Elin
2 months ago
Definitely D) Reentrancy! That's a classic one.
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Valentin
2 months ago
I remember reading about arithmetic issues, but they seem less relevant to exchanges like Bancor. Maybe it's D) Reentrancy after all?
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Francoise
2 months ago
I practiced a question similar to this, and I think the answer was C) Race Conditions. But I'm not confident about that.
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Salome
2 months ago
I feel like access control vulnerabilities could also be a factor, but I can't recall a specific example related to exchanges.
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Lina
2 months ago
I think it might be D) Reentrancy, but I'm not entirely sure. I remember it being a common issue in smart contracts.
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