No exploitation reportedFix available

CVE-2017-9991

No exploitation reported by the sources we read.

Published2017-06-28
WeaknessCWE-119

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Heap-based buffer overflow in the xwd_decode_frame function in libavcodec/xwddec.c in FFmpeg before 2.8.12, 3.0.x before 3.0.8, 3.1.x before 3.1.8, 3.2.x before 3.2.5, and 3.3.x before 3.3.1 allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted file.

Timeline

dates in UTC

2017-06-2806:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-9991?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-9991?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Ffmpeg

Branch	Affected	Fixed in	Source
2.8	≤ 2.8.11	no fix published	NVD
3.0	= 3.0	no fix published	NVD
3.0	= 3.0.1	no fix published	NVD
3.0	= 3.0.2	no fix published	NVD
3.0	= 3.0.3	no fix published	NVD
3.0	= 3.0.4	no fix published	NVD
3.0	= 3.0.5	no fix published	NVD
3.0	= 3.0.6	no fix published	NVD
3.0	= 3.0.7	no fix published	NVD
3.1	= 3.1	no fix published	NVD
3.1	= 3.1.1	no fix published	NVD
3.1	= 3.1.2	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

github.comPatch

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.07.8read 2026-10-23
NVDCVSS 2.06.8read 2026-10-23
NVDweakness (CWE)CWE-119read 2026-10-23
FIRST EPSSEPSS score1.8 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2017-06-28
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2017-9991?

Is CVE-2017-9991 actively exploited?

Active exploitation of CVE-2017-9991 has not been confirmed. Its EPSS score was 1.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-9991?

CVE-2017-9991 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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