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CVE-2026-5245

5.6 · MEDIUM

A vulnerability was found in Cesanta Mongoose up to 7.20.

Published Apr 2, 2026CWE-119EPSS 0.62%

Overview

CVE-2026-5245 is a medium-severity vulnerability. It was published on April 2, 2026 and has a CVSS 3.1 base score of 5.6 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.6, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A vulnerability was found in Cesanta Mongoose up to 7.20. This impacts the function handle_mdns_record of the file mongoose.c of the component mDNS Record Handler. Performing a manipulation of the argument buf results in stack-based buffer overflow. Remote exploitation of the attack is possible. A high degree of complexity is needed for the attack. The exploitability is said to be difficult. The exploit has been made public and could be used. Upgrading to version 7.21 will fix this issue. The patch is named 0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/cesanta/mongoose/GitHubgithub.com/cesanta/mongoose/commit/0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1GitHubgithub.com/cesanta/mongoose/releases/tag/7.21Refvuldb.com/submit/770103Refvuldb.com/vuln/354826Refvuldb.com/vuln/354826/cti

How CyberStrike helps

Frequently asked questions

What is CVE-2026-5245?

CVE-2026-5245 is a medium-severity vulnerability. It was published on April 2, 2026 and has a CVSS 3.1 base score of 5.6 (MEDIUM).

How severe is CVE-2026-5245?

This vulnerability has a CVSS 3.1 base score of 5.6, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-5245?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-5245?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-5245 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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