CVE-2018-0541: Buffer overflow in Tiny FTP Daemon Ver0.52d allows an attacker to cause a denial-of-service (DoS) condition or

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2018-0541 is a critical-severity flaw (CVSS 9.8) affecting tinyftp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in Tiny FTP Daemon Ver0.52d allows an attacker to cause a denial-of-service (DoS) condition or execute arbitrary code via unspecified vectors.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.1% (top 12%)
CISA exploited list	No
Weakness	CWE-119
Published	2018-03-22
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: tinyftp project

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

Am I affected?

Timeline

2018-03-22 13:29 UTCPublished CVE record published
2026-06-17 01:31 UTCUpdated Record last modified

tinyftp project tinyftp DOWNGRADE

Affected: 0.52 d

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.52

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.52 (Debian / Ubuntu)

apt-cache madison tinyftp sudo apt install tinyftp=<VERSION_BEFORE_0.52> sudo apt-mark hold tinyftp

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

dnf --showduplicates list tinyftp sudo dnf downgrade tinyftp-<VERSION_BEFORE_0.52> sudo dnf versionlock add tinyftp

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-2018-0541?

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

Is CVE-2018-0541 being exploited?

CVE-2018-0541 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-2018-0541 affect?

CVE-2018-0541 affects tinyftp. Severity is critical (CVSS 9.8). Buffer overflow in Tiny FTP Daemon Ver0.52d allows an attacker to cause a denial-of-service (DoS) condition or execute arbitrary code via unspecified vectors.

How urgent is CVE-2018-0541?

Priority 61/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2018-17106 HIGH 7.5 DOWNGRADE In Tinyftp Tinyftpd 1.1, a buffer overflow exists in the text variable of the do_mkd function in the ftpproto.

References

← Back to latest CVEs