CVE-2020-25927

Name: CVE-2020-25927
Creator: NVD / NIST
Published: 2021-08-18T19:15:07.247+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.27%

Last modified Jun 17, 2026

CVE-2020-25927 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The DNS feature in InterNiche NicheStack TCP/IP 4.0.1 is affected by: Out-of-bounds Read. The impact is: a denial of service (remote). EPSS estimates a 2.27% chance of exploitation in the next 30 days.

Description

The DNS feature in InterNiche NicheStack TCP/IP 4.0.1 is affected by: Out-of-bounds Read. The impact is: a denial of service (remote). The component is: DNS response processing in function: dns_upcall(). The attack vector is: a specific DNS response packet. The code does not check whether the number of queries/responses specified in the DNS packet header corresponds to the query/response data available in the DNS packet.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.27%

80.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Hcc-Embedded	Nichestack Tcp\/Ip	4.0.1

References

http://www.iniche.com/source-code/networking-stack/nichestack.phpBroken Link
https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/Mitigation, Third Party Advisory
https://www.kb.cert.org/vuls/id/608209Third Party Advisory, US Government Resource
http://www.iniche.com/source-code/networking-stack/nichestack.phpBroken Link
https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/Mitigation, Third Party Advisory
https://www.kb.cert.org/vuls/id/608209Third Party Advisory, US Government Resource

Timeline

Published: Aug 18, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-25927?

How severe is CVE-2020-25927?

CVE-2020-25927 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.27% probability of exploitation in the next 30 days.

How do I fix CVE-2020-25927?

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-2020-25927?

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

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Source: NVD / NIST