Is CVE-2019-9748 actively exploited?

No active exploitation of CVE-2019-9748 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-9748 be exploited remotely?

Yes. CVE-2019-9748 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2019-9748?

CVE-2019-9748 has a CVSS score of 9.1 (CRITICAL).

HOME VULNERABILITIESCVE-2019-9748

CRITICAL

CVE-2019-9748

CWE-125Published: March 13, 2019· Updated: Jun 17, 2026

9.1

CVSS v3.1

Official Description

In tinysvcmdns through 2018-01-16, an mDNS server processing a crafted packet can perform arbitrary data read operations up to 16383 bytes from the start of the buffer. This can lead to a segmentation fault in uncompress_nlabel in mdns.c and a crash of the server (depending on the memory protection of the CPU and the operating system), or disclosure of memory content via error messages or a server response. NOTE: the product's web site states "This project is un-maintained, and has been since 2013. ... There are known vulnerabilities ... You are advised to NOT use this library for any new projects / products."

NVD Source

Technical Analysis

CVE-2019-9748 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.

A successful exploit results in complete confidentiality breach (data exposure), availability disruption (denial of service), with a CVSS base score of 9.1.