CVE-2021-41173

Name: CVE-2021-41173
Creator: NVD / NIST
Published: 2021-10-26T14:15:08.13+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.7/10EPSS 1.20%

Last modified Jun 17, 2026

CVE-2021-41173 is a medium-severity vulnerability rated 5.7/10 on the CVSS scale. Go Ethereum is the official Golang implementation of the Ethereum protocol. Prior to version 1.10.9, a vulnerable node is susceptible to crash when processing a maliciously crafted message from a peer. EPSS estimates a 1.20% chance of exploitation in the next 30 days.

Description

Go Ethereum is the official Golang implementation of the Ethereum protocol. Prior to version 1.10.9, a vulnerable node is susceptible to crash when processing a maliciously crafted message from a peer. Version v1.10.9 contains patches to the vulnerability. There are no known workarounds aside from upgrading.

Metrics

CVSS 3.1

5.7/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

1.20%

64.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Ethereum	Go Ethereum	< 1.10.9

References

https://github.com/ethereum/go-ethereum/commit/e40b37718326b8b4873b3b00a0db2e6c6d9ea738Patch, Third Party Advisory
https://github.com/ethereum/go-ethereum/pull/23801Patch, Third Party Advisory
https://github.com/ethereum/go-ethereum/releases/tag/v1.10.9Release Notes, Third Party Advisory
https://github.com/ethereum/go-ethereum/security/advisories/GHSA-59hh-656j-3p7vThird Party Advisory
https://github.com/ethereum/go-ethereum/commit/e40b37718326b8b4873b3b00a0db2e6c6d9ea738Patch, Third Party Advisory
https://github.com/ethereum/go-ethereum/pull/23801Patch, Third Party Advisory
https://github.com/ethereum/go-ethereum/releases/tag/v1.10.9Release Notes, Third Party Advisory
https://github.com/ethereum/go-ethereum/security/advisories/GHSA-59hh-656j-3p7vThird Party Advisory

Timeline

Published: Oct 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-41173?

How severe is CVE-2021-41173?

CVE-2021-41173 has a CVSS score of 5.7/10 (MEDIUM severity). The EPSS model estimates a 1.20% probability of exploitation in the next 30 days.

How do I fix CVE-2021-41173?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-41173?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST