Is CVE-2026-5245 actively exploited?

No active exploitation of CVE-2026-5245 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-5245 be exploited remotely?

Yes. CVE-2026-5245 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-5245?

CVE-2026-5245 has a CVSS score of 5.6 (MEDIUM).

HOME VULNERABILITIESCVE-2026-5245

MEDIUM

CVE-2026-5245

CWE-119Published: April 2, 2026· Updated: Apr 3, 2026

5.6

CVSS v3.1

EPSS:0.06%probability of exploitation in 30 daysPercentile:18.3th

Official 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.

NVD Source

Technical Analysis

CVE-2026-5245 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.