CVE-2018-9059: Stack-based buffer overflow in Easy File Sharing (EFS) Web Server 7.2 allows remote attackers to execute arbit

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2018-9059 is a critical-severity flaw (CVSS 9.8) affecting easy file sharing web server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stack-based buffer overflow in Easy File Sharing (EFS) Web Server 7.2 allows remote attackers to execute arbitrary code via a malicious login request to forum.ghp. NOTE: this may overlap CVE-2014-3791.

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
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	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	77.3% (top 1%)
CISA exploited list	No
Weakness	CWE-119
Published	2018-04-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: sharing-file

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

Am I affected?

Timeline

2018-04-20 21:29 UTCPublished CVE record published
2026-06-17 02:06 UTCUpdated Record last modified

sharing-file easy file sharing web server DOWNGRADE

Affected: 7.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.2

1. Check installed version

apt-cache policy easy-file-sharing-web-server || rpm -q easy-file-sharing-web-server || easy-file-sharing-web-server --version

2. No fixed release: DOWNGRADE to a release before 7.2 (Debian / Ubuntu)

apt-cache madison easy-file-sharing-web-server sudo apt install easy-file-sharing-web-server=<VERSION_BEFORE_7.2> sudo apt-mark hold easy-file-sharing-web-server

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

dnf --showduplicates list easy-file-sharing-web-server sudo dnf downgrade easy-file-sharing-web-server-<VERSION_BEFORE_7.2> sudo dnf versionlock add easy-file-sharing-web-server

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: Easy File Sharing Web Server 7.2 - 'UserID' Remote Buffer Overflow (DEP Bypass)
Exploit-DB: Easy File Sharing Web Server 7.2 - Stack Buffer Overflow
Metasploit: Easy File Sharing HTTP Server 7.2 SEH Overflow

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-2018-9059?

easy file sharing web server: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-9059 being exploited?

CVE-2018-9059 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-2018-9059 affect?

CVE-2018-9059 affects easy file sharing web server. Severity is critical (CVSS 9.8). Stack-based buffer overflow in Easy File Sharing (EFS) Web Server 7.2 allows remote attackers to execute arbitrary code via a malicious login request to forum.ghp. NOTE: this may overlap CVE-2014-3791.

How urgent is CVE-2018-9059?

Priority 69/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2018-18912 CRITICAL 9.8 DOWNGRADE An issue was discovered in Easy File Sharing (EFS) Web Server 7.2

References

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