CVE-2020-25110

Name: CVE-2020-25110
Creator: NVD / NIST
Published: 2020-12-11T23:15:14.433+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 52.26%

Last modified Jun 17, 2026

CVE-2020-25110 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered in the DNS implementation in Ethernut in Nut/OS 5.1. The length byte of a domain name in a DNS query/response is not checked, and is used for internal memory operations. EPSS estimates a 52.26% chance of exploitation in the next 30 days.

Description

An issue was discovered in the DNS implementation in Ethernut in Nut/OS 5.1. The length byte of a domain name in a DNS query/response is not checked, and is used for internal memory operations. This may lead to successful Denial-of-Service, and possibly Remote Code Execution.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

52.26%

98.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Ethernut	Nut\/Os	<= 5.1

References

https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01Third Party Advisory, US Government Resource
https://www.kb.cert.org/vuls/id/815128Third Party Advisory, US Government Resource
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01Third Party Advisory, US Government Resource
https://www.kb.cert.org/vuls/id/815128Third Party Advisory, US Government Resource

Timeline

Published: Dec 11, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-25110?

How severe is CVE-2020-25110?

CVE-2020-25110 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 52.26% probability of exploitation in the next 30 days.

How do I fix CVE-2020-25110?

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-2020-25110?

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

Scan your code now

Source: NVD / NIST