CVE-2021-35041

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-06-24 · updated 2026-06-17
Weakness: CWE-20

Description

The blockchain node in FISCO-BCOS V2.7.2 may have a bug when dealing with unformatted packet and lead to a crash. A malicious node can send a packet continuously. The packet is in an incorrect format and cannot be decoded by the node correctly. As a result, the node may consume the memory sustainably and crash. More details are shown at: https://github.com/FISCO-BCOS/FISCO-BCOS/issues/1951

Affected products

FISCO-BCOS: 2.7.2

References

https://github.com/FISCO-BCOS/FISCO-BCOS/issues/1951
https://github.com/FISCO-BCOS/FISCO-BCOS/issues/1951

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