CVE-2019-25683: FileZilla 3.40.0 contains a denial of service vulnerability in the local search functionality that allows loca

Routine

MEDIUM 6.2DOWNGRADE

CVE-2019-25683 is a medium-severity flaw (CVSS 6.2) affecting filezilla client. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

FileZilla 3.40.0 contains a denial of service vulnerability in the local search functionality that allows local attackers to crash the application by supplying a malformed path string. Attackers can trigger the crash by entering a crafted path containing 384 'A' characters followed by 'BBBB' and 'CCCC' sequences in the search directory field and initiating a local search operation.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.2 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 93%)
CISA exploited list	No
Weakness	CWE-532
Published	2026-04-05
Last modified	2026-07-24

Publisher (CNA): VulnCheck · Vendor: filezilla-project

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-05 21:16 UTCPublished CVE record published
2026-07-24 22:10 UTCUpdated Record last modified

filezilla-project filezilla client DOWNGRADE

Affected: 3.40.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.40.0

1. Check installed version

apt-cache policy filezilla-client || rpm -q filezilla-client || filezilla-client --version

2. No fixed release: DOWNGRADE to a release before 3.40.0 (Debian / Ubuntu)

apt-cache madison filezilla-client sudo apt install filezilla-client=<VERSION_BEFORE_3.40.0> sudo apt-mark hold filezilla-client

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

dnf --showduplicates list filezilla-client sudo dnf downgrade filezilla-client-<VERSION_BEFORE_3.40.0> sudo dnf versionlock add filezilla-client

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-2019-25683?

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

Is CVE-2019-25683 being exploited?

CVE-2019-25683 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-2019-25683 affect?

CVE-2019-25683 affects filezilla client. Severity is medium (CVSS 6.2). FileZilla 3.40.0 contains a denial of service vulnerability in the local search functionality that allows local attackers to crash the application by supplying a malformed path string. Attackers can trigger the crash by entering a crafted p

How urgent is CVE-2019-25683?

Priority 28/100. Public exploit reference

Software pages

FileZilla vulnerabilities

References

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