CVE-2017-12784: In Youngzsoft CCFile (aka CC File Transfer) 3.6, by sending a crafted HTTP request, it is possible for a malic

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HIGH 7.5REMOTEDOWNGRADE

CVE-2017-12784 is a high-severity flaw (CVSS 7.5) affecting cc file transfer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Youngzsoft CCFile (aka CC File Transfer) 3.6, by sending a crafted HTTP request, it is possible for a malicious user to remotely crash the affected software. No authentication is required. An example payload is a malformed request header with many '|' characters. NOTE: some sources use this ID for a NoviWare issue, but the correct ID for that issue is CVE-2017-12787.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.3% (top 17%)
CISA exploited list	No
Weakness	CWE-20
Published	2017-08-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ccfile

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

Am I affected?

Timeline

2017-08-21 07:29 UTCPublished CVE record published
2026-06-17 01:03 UTCUpdated Record last modified

ccfile cc file transfer DOWNGRADE

Affected: 3.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.6

1. Check installed version

apt-cache policy cc-file-transfer || rpm -q cc-file-transfer || cc-file-transfer --version

2. No fixed release: DOWNGRADE to a release before 3.6 (Debian / Ubuntu)

apt-cache madison cc-file-transfer sudo apt install cc-file-transfer=<VERSION_BEFORE_3.6> sudo apt-mark hold cc-file-transfer

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list cc-file-transfer sudo dnf downgrade cc-file-transfer-<VERSION_BEFORE_3.6> sudo dnf versionlock add cc-file-transfer

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2017-12784?

cc file transfer: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-12784 being exploited?

CVE-2017-12784 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-2017-12784 affect?

CVE-2017-12784 affects cc file transfer. Severity is high (CVSS 7.5). In Youngzsoft CCFile (aka CC File Transfer) 3.6, by sending a crafted HTTP request, it is possible for a malicious user to remotely crash the affected software. No authentication is required. An example payload is a malformed request header

How urgent is CVE-2017-12784?

Priority 57/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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