How severe is CVE-2021-41173?

CVE-2021-41173 has a CVSS 3.x base score of 5.7, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-41173 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-41173?

CVE-2021-41173 affects Ethereum Go Ethereum. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-41173?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-41173 published?

CVE-2021-41173 was published on 2021-10-26 and last updated on 2026-06-17.

CVE-2021-41173

CVE-2021-41173 is a medium-severity vulnerability in Ethereum Go Ethereum with a CVSS 3.x base score of 5.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 5.7)
CVSS v2: 3.5
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Ethereum Go Ethereum
Published: 2021-10-26
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-41173?: 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.
How severe is CVE-2021-41173?: CVE-2021-41173 has a CVSS 3.x base score of 5.7, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-41173 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-41173?: CVE-2021-41173 affects Ethereum Go Ethereum. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-41173?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-41173 published?: CVE-2021-41173 was published on 2021-10-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ethereum:go_ethereum:*:*:*:*:*:*:*:*

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