What is CVE-2021-44591?

CVE-2021-44591 is a medium-severity vulnerability in Libming, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2022-01-06.

How severe is CVE-2021-44591?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Libming

CVE-2021-44591

In libming 0.4.8, the parseSWF_DEFINELOSSLESS2 function in util/parser.c lacks a boundary check that would lead to denial-of-service attacks via a crafted SWF file.

Published 2022-01-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.010 (61.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Libming — versions 0.4.8

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

github.com/libming/libming (Third Party Advisory)
github.com/libming/libming/issues/235 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-44591?: CVE-2021-44591 is a medium-severity vulnerability in Libming, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2022-01-06.
How severe is CVE-2021-44591?: Medium severity. CVSS v3 base score is 6.5 out of 10.