What is CVE-2020-24221?

CVE-2020-24221 is a medium-severity vulnerability in Miniupnp Project Ngiflib, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.5/10. Published 2023-08-11.

How severe is CVE-2020-24221?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Miniupnp Project Ngiflib

CVE-2020-24221

An issue was discovered in GetByte function in miniupnp ngiflib version 0.4, allows local attackers to cause a denial of service (DoS) via crafted .gif file (infinite loop).

Published 2023-08-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (22.7th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Miniupnp Project Ngiflib — versions 0.4

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

github.com/miniupnp/ngiflib/issues/17 (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2020-24221?: CVE-2020-24221 is a medium-severity vulnerability in Miniupnp Project Ngiflib, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.5/10. Published 2023-08-11.
How severe is CVE-2020-24221?: Medium severity. CVSS v3 base score is 5.5 out of 10.