# CVE-2015-20111

## Summary

- **CVE ID:** CVE-2015-20111
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** Nov 18, 2024
- **Last Modified:** Sep 17, 2026

## Description

miniupnp before 4c90b87, as used in Bitcoin Core before 0.12 and other products, lacks checks for snprintf return values, leading to a buffer overflow and significant data leak, a different vulnerability than CVE-2019-12107. In Bitcoin Core before 0.12, remote code execution was possible in conjunction with CVE-2015-6031 exploitation.

## Affected Products

- n/a — n/a (n/a)

## References

- [CNA](https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures)
- [CNA](https://bitcoincore.org/en/2024/07/03/disclose_upnp_rce/)
- [CNA](https://github.com/miniupnp/miniupnp/pull/157)
- [CNA](https://github.com/miniupnp/miniupnp/commit/4c90b87ce3d2517097880279e8c3daa7731100e6)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 2.98%
- **EPSS Percentile:** 86.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._