CVE-2017-6191: Buffer overflow in APNGDis 2.8 and below allows a remote attacker to execute arbitrary code via a crafted file

Q: How do I fix CVE-2017-6191?

apng disassembler: upgrade to newer than 2.8. Exact commands for each OS are on this page.

Q: Is CVE-2017-6191 being exploited?

CVE-2017-6191 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2017-6191 affect?

CVE-2017-6191 affects apng disassembler. Severity is high (CVSS 7.8). Buffer overflow in APNGDis 2.8 and below allows a remote attacker to execute arbitrary code via a crafted filename.

Q: How urgent is CVE-2017-6191?

Priority 56/100. High severity; EPSS top 6%: very likely to be exploited; Public exploit reference

This month

HIGH 7.8UPGRADE

CVE-2017-6191 is a high-severity flaw (CVSS 7.8) affecting apng disassembler. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in APNGDis 2.8 and below allows a remote attacker to execute arbitrary code via a crafted filename.

Why this priority

High severity
EPSS top 6%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	6.7% (top 6%)
CISA exploited list	No
Weakness	CWE-119
Published	2017-03-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: apng disassembler project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-03-23 16:59 UTCPublished CVE record published
2026-06-17 01:21 UTCUpdated Record last modified

apng disassembler project apng disassembler UPGRADE

Affected: <= 2.8

Fixed in: newer than 2.8

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy apng-disassembler || rpm -q apng-disassembler || apng-disassembler --version

2. UPGRADE to newer than 2.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade apng-disassembler

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade apng-disassembler

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: APNGDis 2.8 - 'filename' Stack Buffer Overflow (PoC)

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-6191?

apng disassembler: upgrade to newer than 2.8. Exact commands for each OS are on this page.

Is CVE-2017-6191 being exploited?

CVE-2017-6191 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-6191 affect?

CVE-2017-6191 affects apng disassembler. Severity is high (CVSS 7.8). Buffer overflow in APNGDis 2.8 and below allows a remote attacker to execute arbitrary code via a crafted filename.

How urgent is CVE-2017-6191?

Priority 56/100. High severity; EPSS top 6%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2017-6193 MEDIUM 5.5 UPGRADE Buffer overflow in APNGDis 2.8 and earlier allows remote attackers to cause a denial of service and possibly e
CVE-2017-6192 MEDIUM 5.5 UPGRADE Buffer overflow in APNGDis 2.8 and earlier allows a remote attackers to cause denial of service and possibly e

References

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