CVE-2007-1564: The FTP protocol implementation in Konqueror 3.5.5 allows remote servers to force the client to connect to oth

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MEDIUM 6.8DOWNGRADE

CVE-2007-1564 is a medium-severity flaw (CVSS 6.8) affecting konqueror. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The FTP protocol implementation in Konqueror 3.5.5 allows remote servers to force the client to connect to other servers, perform a proxied port scan, or obtain sensitive information by specifying an alternate server address in an FTP PASV response.

Why this priority

EPSS top 10%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	3.9% (top 10%)
CISA exploited list	No
Weakness	CWE-200
Published	2007-03-21
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: kde

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2007-03-21 19:19 UTCPublished CVE record published
2026-06-16 22:37 UTCUpdated Record last modified

kde konqueror DOWNGRADE

Affected: 3.5.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.5.5

1. Check installed version

apt-cache policy konqueror || rpm -q konqueror || konqueror --version

2. No fixed release: DOWNGRADE to a release before 3.5.5 (Debian / Ubuntu)

apt-cache madison konqueror sudo apt install konqueror=<VERSION_BEFORE_3.5.5> sudo apt-mark hold konqueror

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

dnf --showduplicates list konqueror sudo dnf downgrade konqueror-<VERSION_BEFORE_3.5.5> sudo dnf versionlock add konqueror

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.

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: KDE Konqueror 3.x/IOSlave - FTP PASV Port-Scanning

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-2007-1564?

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

Is CVE-2007-1564 being exploited?

CVE-2007-1564 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-2007-1564 affect?

CVE-2007-1564 affects konqueror. Severity is medium (CVSS 6.8). The FTP protocol implementation in Konqueror 3.5.5 allows remote servers to force the client to connect to other servers, perform a proxied port scan, or obtain sensitive information by specifying an alternate server address in an FTP PASV

How urgent is CVE-2007-1564?

Priority 51/100. EPSS top 10%: very likely to be exploited; Public exploit reference

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References

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