# CVE-2019-12111 — Miniupnp Project Miniupnpd

> As of 2024-08-04, CVE-2019-12111 is a HIGH-severity vulnerability in Miniupnp Project Miniupnpd, CVSS v3.1 7.5, EPSS 3.4% (87.4th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2019-12111, most recently “VEXAIoT: Autonomous Multi-Agent LLM Framework Automates End-to-End IoT Vulnerability Discovery and Exploitation (95% Success Rate)”.

**Last updated:** 2024-08-04

## What is CVE-2019-12111?

A Denial Of Service vulnerability in MiniUPnP MiniUPnPd through 2.1 exists due to a NULL pointer dereference in copyIPv6IfDifferent in pcpserver.c.

The record classifies CVE-2019-12111 under weakness class [CWE-476](https://cwe.mitre.org/data/definitions/476.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on availability. 2 affected-product entries are recorded, across 2 vendors, listed below. The identifier was first published 2688 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.5 — HIGH (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **EPSS (FIRST):** 3.4% probability of exploitation in the next 30 days, higher than 87.4% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 9.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2019-05-15, last modified 2024-08-04

## Is CVE-2019-12111 being exploited?

Weaponised exploit code for CVE-2019-12111 is publicly available. 1 public proof-of-concept repository is tracked for this identifier.

- [trickest/cve](https://github.com/trickest/cve/blob/main/2019/CVE-2019-12111.md) (trickest)

## Affected products and versions

- **Miniupnp Project**: Miniupnpd
- **Debian**: Linux 8.0

## How to fix CVE-2019-12111

The record marks a vendor fix as available for CVE-2019-12111. Patch reference: [https://github.com/miniupnp/miniupnp/commit/cb8a02af7a5677cf608e86d57ab04241cf34e24f](https://github.com/miniupnp/miniupnp/commit/cb8a02af7a5677cf608e86d57ab04241cf34e24f). Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

## Threat activity tracking CVE-2019-12111

1 tracked threat in the Threadlinqs corpus references CVE-2019-12111, either in the campaign’s CVE list or as an indicator on the campaign record.

- [VEXAIoT: Autonomous Multi-Agent LLM Framework Automates End-to-End IoT Vulnerability Discovery and Exploitation (95% Success Rate)](https://intel.threadlinqs.com/threat/TL-2026-1261) — MEDIUM · 2026-07-13

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-07-13. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [usn.ubuntu.com — vendor advisory](https://usn.ubuntu.com/4542-1/)

**Mailing list and disclosure**

- [lists.debian.org — mailing list](https://lists.debian.org/debian-lts-announce/2019/05/msg00045.html)

**Other references**

- [vdoo.com](https://www.vdoo.com/blog/security-issues-discovered-in-miniupnp)
- [github.com](https://github.com/miniupnp/miniupnp/commit/cb8a02af7a5677cf608e86d57ab04241cf34e24f)

Canonical: https://intel.threadlinqs.com/cve/CVE-2019-12111
Full detection coverage and IOCs for threats exploiting CVE-2019-12111 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp