What is CVE-2018-20186?

CVE-2018-20186 is a medium-severity vulnerability in Axiosys Bento4, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2018-12-17.

How severe is CVE-2018-20186?

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

Is CVE-2018-20186 known to be exploited?

6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Axiosys Bento4

CVE-2018-20186

An issue was discovered in Bento4 1.5.1-627. AP4_Sample::ReadData in Core/Ap4Sample.cpp allows attackers to trigger an attempted excessive memory allocation, related to AP4_DataBuffer::SetDataSize and AP4_DataBuffer::ReallocateBuffer in Core/Ap4DataBuffer.cpp.

Vulnerability class: DoS (Denial of Service)

Published 2018-12-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.012 (66.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Axiosys Bento4 — versions 1.5.1-627

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

Public proof-of-concept exploits

References

github.com/axiomatic-systems/Bento4/issues/342 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-20186?: CVE-2018-20186 is a medium-severity vulnerability in Axiosys Bento4, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2018-12-17.
How severe is CVE-2018-20186?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2018-20186 known to be exploited?: 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.