Is CVE-2017-7866 in the CISA KEV catalog?

No. CVE-2017-7866 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-7866?

CVE-2017-7866 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2017-7866?

CVE-2017-7866 has an EPSS score of 2.51% (83th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-7866?

Upgrade ffmpeg on debian 11 to 7:3.2.4-1 or later.

CVE & CISA-KEV Catalog

CVE-2017-7866

CRITICALEPSS 83th pctl

9.8

CVSS v3

NVD

Description

FFmpeg before 2017-01-23 has an out-of-bounds write caused by a stack-based buffer overflow related to the decode_zbuf function in libavcodec/pngdec.c.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

ffmpegDebian

Fixed in:7:3.2.4-1CVE-2017-7866

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

2.51%probability of exploitation in 30 days

83rdpercentile

Elevated risk: more likely to be exploited than 83% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory2

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

Embed a live status badge for CVE-2017-7866

Markdown

[![CVE-2017-7866](https://tridentstack.com/cve/badge/CVE-2017-7866.svg)](https://tridentstack.com/cve/CVE-2017-7866)

HTML

<a href="https://tridentstack.com/cve/CVE-2017-7866"><img src="https://tridentstack.com/cve/badge/CVE-2017-7866.svg" alt="CVE-2017-7866"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.